I do actually have a wholesale acct with KW as well, and the variant 2's come in a couple/few hundred bucks less than the JIC A2's.
The things that hit me as being really obvious differences are:
-- JIC is (HUGE) inverted strut, which is a stronger design that holds up to side-2-side forces better and other abuse better...which is why rally struts are like this and the OEM STI struts are inverted. For most street cars it really doesn't matter, but it's still a +
-- JIC is both compression and rebound dampening adjustable. The KW V2 are only rebound adjustable
-- The height adjustment for the JIC is done by moving the shock body up or down inside of the bottom hub mount. You can see the red collar at the bottom of the threaded shock body in the picture:
So no matter where the height is, it has absolutely no effect on spring pre-load or suspension travel. I have not held the LGT-specific KW's in my hand but from most of their documentation it looks like the bottom hub mount thing is completely fixed and the height adjustment is done by moving the collars under the spring up or down. Lowering means reducing strut compression travel and raising that way preloads the springs and reduces or even gets completely rid of suspension droop, which is NOT a bad thing... you don't want to be lifting tires every time you go over a bump or corner. It's a really nice thing to have height adjustment COMPLETELY separate from spring/strut adjustment.
-- JIC's have one linear spring. Not sure if the KW's for the LGT specific application are like that or if they have helper springs... I know a lot of the KW's use helper springs or maybe a single progressive spring. This is really personal preference either way. Honestly, I'd probably rather have a progressive spring over anything. The helper spring is like a simpler way to do "progressive" I suppose. Either way those will probably ride smoother and linear will ride the tightest. Presumably if you're getting coilovers a nice, gentle ride isn't on the top of your priority list anyway. But the good dampening adjustment on the JIC does help a lot. I rode in a friend's Legacy with 900lb front and rear springs on JIC FLT-A2's and on full soft it wasn't anywhere near as bad as you would expect.
Anyway other than that stuff, which is pretty apparent looking at the two and reading the specs I don't really have much to say because I'm not as familiar with the KW's as I should be. I haven't ridden in a Legacy with them and haven't had a chance to play with a set. I know the KW quality is VERY good as well and I would have absolutely positively no reservations about getting them from that standpoint. They're very nice. The JIC are extremely nice as well though.
We also have a very good relationship with JIC and the owner of the company. We get very good US support on the products so if there ever were any issues for whatever reason, we can get it handled in a very quick manner. Our guy Sammy here is also extremely knowledgeable on the JIC parts having spent a lot of time at the track learning from JIC's owner, so if you had questions on dialing your suspension in we can help with that, too.
Hope it helps.
....and if anyone wants a quote on KW suspension stuff, just e-mail or PM me!... also have good accts w/ Progress, Eibach, Vogtland, HKS, and Apex'i along with, of course, the JIC and KW....
doesn't make a Legacy suspension but if they did and if you wanted to spend like $5,000 to $14,000 we can help you there, too
. Our time attack Evo is running their 4-way adjustable (compression, rebound, high speed and low speed dampening all separately
adjustable) remote resevoir coilovers... on a sponsor deal, but at a cool ~ $13,500 they're no joke!!!