Hotchkiss has a great reputation, they just haven't been in the game as long as Eibach. It's like choosing between Baer and Brembro.
There's actually alot of difference between the Hotckiss and Eibach's.
The rear Eibach sway bar is adjustable and is 1 mm thicker (22 vs. 21) then the rear Hotchkiss sway. But the front eibach is thinner then the Hotchkiss (28 vs. 30) sways are stiffer, both front and rear. Which means you're gonna get a little more oversteer with the Hotchkiss.
With the springs, Hotchkiss claims a 1.5F/1.8R vs the eibachs 1.2/1.2. If this is the case, if the ratio works out in real life, then the Hotchkiss springs will induce a little understeer. So take that for what you will. Hotchkiss sways increase oversteer more then eibachs, but increase understeer with the springs versus the eibachs. With most cars, the Hotchkiss tends to be a higher performing set. Eibachs always ride a little nicer. Both are solid quality, not sure about warranty.
Have fun!