Ammo - no! This is a well balanced product that would be the best first purchase as it is the easiest to get to grips with and least likely to cause problems for someone your age - other than socials, which are quite viable for attraction on a young guy as you are probably pushing-out a good whack of none anyway. It is also very good to pair Ammo with Instant Shine.
As for the difference between the Ammo versions. I’ve already answered that one for today:
A good youthful and sociable status combo is Ammo (any version) and IG - the IG steering is much more in line with your age and younger women tend to go on a more broad-based sexy/social/status signature anyway. Its when they hit their mid 20s and esp over 30 that a more severe status and overtly sexual mix becomes really attractive.
You do get exceptions of course but TUTH on a guy your age is likely to backfire in all but the most raunchy/uninhibited situations (clubs/parties/established partners etc) - its the chemical equivalent of walking about with your cock out or that intense creepy guy sitting in the corner, dribbling at the sight of all the attractive girls. Neither are the best attraction strategy for normal women!
However, in a club/party situation, a small amount of TUTH, worn under a t-shirt or light clothing, moderated with IO and IS is a combo that many guys your age have used effectively but its not a daytime/class/polite company mix! 