Hoyt risers have different limb pocket angles to give +/-5% from the marked weight on the limbs.
other than that
Short limbs are faster, Less mass in the limb so it can recover faster. Though it does not defend its string angles out to longer draw lengths so is prone to stacking earler and subject to .
The longer limb allows a smoother feel to the draw, as the vally in the draw force curve is a fraction longer as the limb tip has further to travel.
the reason for the longer riser is to get this extra performance by shortening the limbs, but if thats not an issue, then the shorter riser will get the limbs working better for you. but should still retain some of that extra smoothness and stability of the longer limbs...
lol, thou i wont mention the idea of odd size limbs, like 67"
