I do not find it hard to serve with
I can't comment on the PB, as we have one Organix and one DNX. Given they are virtually identical to play with, I would guess the PB is too!
I know a 5.0 guy who uses the PB 4 stock standard, wins more than he loses.. (he switched because of arm soreness from his old Pure Drives)
5.0 all courter. Dunlop Bio 400T with cyclone @ 50, Prince CTS Precision 90
"Tennis isn't easy" - Corners