Zapt is better then rotondos mod 10 fold, Zapt v2 will have a smasher (charger), jocky, possibly a witch and a spitter. You will be able to configure it so it works out like verses in L4D. Also L4B breaks JVS content, Server spawn functions, and is hacky at best
I don't want to start a big argument, but I just think Rotondo's is better (custom sounds, models, director, downed option, ammo, health kits, smoker, playertype, and ORIGINAL stuff that Iban copied, like health locker> medical cabinet. Ugh)
Still, you HAVE to get the Blackhawk. I just realized how much it fits.