Mancini XHD vs. Jegs XHD leafs

Does anyone know if there is a difference between the Mancini XHD springs and the Mopar Performance XHD Springs (P4510268/9) that you can get at Jegs or Summit? The Mopar Performance ones are about twice as expensive and I had read some threads about the Mancini being different left/right because of launching. This car will rarely see track time, I'm just trying to get a nice cruiser with a tight but not too rough ride.

Mancini
http://chucker54.stores.yahoo.net/maaexhedules1.html

Mopar Performance (Driver's Side)
http://www.jegs.com/i/Mopar-Performance/312/P4510269/10002/-1

If these are the same, obviously I'd get the Mancini ones, but I don't want my car set up for drag racing when I'm just going to be cruising.

Follow up question: I'm thinking of just doing all new suspension while I'm at it. I was thinking KYB Gas-A-Just all around, 1" torsion bars from Just-Suspension, and XHD springs, does that sound pretty good for a cruiser? Would Monroe Sensa-Trac shocks be better in the rear in case I need to haul stuff on a road trip or would I notice much difference? I still need to measure the bars on there now and see what shocks I have to make sure they aren't better than I think, but it feels pretty soggy in the turns.

Edit: I just measured and the fronts are .875" or so torsion bars (whatever size is closest to that). I think I'll want to upgrade those for a nicer feel in the front at the least.