Yes. Firmfeel makes great products, but they pretty much stick to the original designs with improved spring rates, thicker torsion bars, etc.
Hotchkis actually redesigned the suspension, changing the mounting locations of the suspension points. The Hotchkis sway bars are actually hollow, so even though they have higher rates they weigh less than most aftermarket sway bars. The rear springs are also redesigned and have fewer leafs (lighter).
The Hotchkis stuff is also more expensive, but it definitely takes things up a notch.