From a "specs" point of view I can't help ya. Ya thats what it says on the info page, but "human error" can happen any time.
From a flight point of view, the "G" is the lightest and most nimble of the bunch. If flown well it can pretty much out turn anything. Acceleration is good, but with-out WEP it can give ya fits sometimes
The "J" is the best of the bunch from my point of view. Its a bit heavyer feeling, but with the extra power over the "G" can get out of trouble better.
The "L" is heavyer yet, but with the added power and controls I don't think it makes up for the extra weight.
The "G" excells as a turn fighter, the "L" excells as a BnZer, and the "J" does both very well.
Reading info either here, HTC's web site, Sodas and so on is good for a nice base line, but there is no substitute for stick time to really know a plane