I've had a month and a half to discover these two cartridges.  Our preconceptions can cloud our judgment and distract us from the truth.  While both these cartridges adhere to some moving coil cartridge preconceptions, in other ways they break the mold, and price barriers.

Both cartridges:

With a tiny Gyger 2 stylus tip, they are more difficult to set up than a DL103, or similar cartridges with elliptical or spherical tips.  Further, the ruby cantilever of the Tiger is translucent.  So, they are both a little demanding to set up.  The world champions for difficult setup are the Dynavector Karats, Deccas and Ikedas.  The Turtle and Tiger are not that difficult.  But, it does require patience.  Because this is a line-contact stylus, lowest distortion requires that the tip is properly aligned.  That requires the correct vertical tracking force, which usually changes during the break-in as the suspension relaxes.  It's best to allow the cartridge to break in a while before spending a long time perfecting the alignment.  There are drawings that show the correct tracking angle for all stylus tips.  From the side, if you could actually see the stylus tip, the top of the tip is leaning forward slightly.  As the record moves forward, the stylus tip swings/rotates up.  I will find an appropriate visual to add to the home page for the two cartridges.

Like many moving coils, the sound started off bright.  The wire that adds tension to the cantilevers and holds them in place, and the rubber suspension pieces, requires 10-20 hours of run time (more on the Turtle, and less on the Tiger).  They start settling down after a few sides, but do need a traditional mechanical break-in period while the wire and rubber relax.  These break-in periods are "planned in" as part of hitting specific VTF and compliance goals.  When you tension the cantilever on a moving coil, the tension set during assembly will gradually lower as the cartridge breaks in.  In other words, to meet a specific compliance target, many moving coils are built with extra tension to compensate for the break-in period.

Both cartridges sounded like they had healthy output.  The Turtle sounded like it was closer to .8 mV than .6 mV.  Of course, .2mV isn't a huge margin.  Plus, this is a subjective thing.  I was juggling several phono stages.  The bottom line is that the Turtle has plenty of output for any phono stage with a MC input.  With my preference being slightly warmer than real life (my room is a little bright), I used the Turtle with a step-up transformer, and loaded the secondary with 20K (instead of 47K).  The extra electrical load made the cartridge more romantic.  You can dramatically affect the sound of moving coils based on loading.  But, I would suggest that you let all MC cartridges break-in, and that you are sure the cartridges are properly aligned, before experimenting with loading.  That is a general statement on all new moving coils, and even a few moving magnets.  I tried the Turtle with Jasmine, Allnic H1500 and Sutherland phono stages.  

The output of the Tiger, at .3mV, was enough to drive the Jasmine LP2.5 and Allnic H1500 to high volumes.  It sounded excellent with the LP2.5 phono stage.  The improvements in the Tiger, compared to the Turtle, were several, and easy to hear: faster, smoother highs, more dynamic and better imaging.  This all makes perfect sense: the aluminum cantilever, and the extra wire of the Turtle adds inductance, mass and resonance over the ruby cantilever equipped and lower-output Tiger.  There was less variation in tonal balance when "loading down" the Tiger.  In other words, as I decrease the ohm loading, which is a "higher" load, the sound of the cartridge changed less than with the Turtle.  The "braking" created by the higher load has less effect when there are fewer turns of wire, and less mass to damp.

A common characteristic of both cartridges is fantastic speed and almost unbelievable dynamics.  On some records, it seemed like the dynamic impact was close to a Decca, something difficult to do.  Imaging and depth was very good, and slightly better on the Tiger.  I did note that great imaging depended on proper alignment, and both cartridges had a sweet spot for loading (because tonality changes with loading, and tonality affects the perception of depth, most moving coils have a specific loading where they sound "deeper" in your system; one click lower and it sounds too dark and dead; one click higher and it could be too bright). 

I expected the cartridges to be "low compliance", but they aren't.  They are medium compliance.  When I loaded them on the light-weight magnesium SME V, the combination produced thunderous bass.  The cartridges themselves have above average weight because of their porcelain bodies, which adds effective mass to the SME, which then lowers the resonance point of the combination, producing clean and powerful bass.  I haven't listened long enough to experiment with damping.  My prejudice is against damping with most cartridges and tonearms.

Bias/antiskating was very interesting.  At 1.7 grams, the cartridges track fine with zero antiskate (though the soundstage did audibly shift).  The imaging was restored with proper antiskate adjustment.  The amount of "bias" you will need depends on tracking force, arm length, and how well you have aligned the cartridge.  Line contact styli will produce more "skating forces", especially if they are misaligned.  All these adjustments affect each other, with all cartridges, all the time: VTF affects VTA, which affects tracking, which deflects the cantilever, which affects skating forces.  The phono stage load acts as an electrical "drag" on the cartridge, just like an alternator requires more power to turn when the load is raised.  That assumes that overhang was set correctly, and there are multiple opinions on which alignment method is best.   I do make house calls!

All cartridges are alternators (they produce alternating current when you move them).  The only difference between a cartridge, and the alternator in your car, is that the car's alternator always moves the same direction.  

Good information to help you understand the effect of loads on alternators:

http://answers.yahoo.com/question/index?qid=20090507030213AABHiA6

http://www.physicsforums.com/showthread.php?t=474721

http://www.delcoremy.com/documents/high-efficiency-white-paper.aspx

I will be sending these cartridges for reviews.  I think their future is very good, and I am proud to represent Jasmine.