noob to the game
 

alright im looking at getting into the game i was just wondering what the diff in a s4 and s5 is and the models gxl gul and so on what the diff was in that any help would be lovely thanks

Look in the second gen section in the stickies all the info is there.

S5 had an aero package.
S4 = zenki (early)
S5 = kouki (latter)