Enobenetto,
Yes, higher compliance is associated with lower tracking force and high compliance carts are usually mated with low mass arms. If you use a high cu cart on a high mass arm the resultant low resonance frequency may or may not have warp tracking implications, but SQ is often compromised with slow or sluggish response. On the other hand, use a low cu cart (103) on an arm too light for the cart, and resultant resonance is too high in frequency and can have severe intermodulation in the audio band.
Converting 100Hz cu to 10Hz, isn't straightforward. There is no single multiplier that works in all cases. It also doesn't seem to work at the extremes. A 100Hz cu of 6.5 = 15cu @ 10Hz, while 10 cu @ 100 = 18 cu @ 10. A cart with 100Hz cu of 16 is a little more compliant than another of 10cu. Clearly the multiplier diminishes with higher cu, except the 103 seems lower than the scale indicates. On another forum a physicist said that 100Hz cu isn't true compliance, but rather a measure of tracking ability at 100Hz.
Sometimes terms are generalized and it's not clear exactly what your "retip" entails. If a cantilever was grafted onto an existing one, then the cart probably retains the original compliance, as in a tip only replacement. A more sophisticated tip profile might result in a lower VTF. Some carts can have cu manipulated by the retipper and you should consult with him about possibilities or the results of your retip.
The elliptical tip has the smallest contact area, a tiny oval. The .2 x .7 elliptical is the smallest, unless there's one with a smaller minor radius (.2). That minor radius describes the width of the contact area and that's why its sound is more detailed. The most common elliptical is .3 x .7. Extended contact tips extend contact vertically and that's why they can have a very small minor radius for detail, and contact part of the groove that hasn't been tracked by one with a shorter contact area. It's also the reason set-up is so fussy. Since a conical doesn't have a distinguishing profile, it's more forgiving.
Regards,