i have been playing the prov1 and prov1x for a long time and here are my experiences. and i have switched to the B330, and B330rx
for the longest time i kind of use prov1 and prov1s and switch them between long and short holes. For mid iron par3s and short par4s i will use the pro v1. Long holes i use the prov1x. Its been working perfectly and honestly i can only start telling the difference not too long ago.
few months ago i got a box of bridgestone golf balls which has a sleeve of their line ups. and i will round up like this after using and trying them all.
B330 is similar to ProV1x, more durable and longer, but not as soft.
B330s is similar to ProV1, more durable and longer, but not as soft.
B330rx is like softer verson of Prov1, but more durable. it is as long, if not equal to prov1 off the driver. but i can make the ball check with a 5 iron on green approaches.
i now switched to b330 and b330rx, depending on the hole.
B330rx is the ball that taught me what compressing the ball fully feels like.
and it also showed me how to generate spin on the ball by compressing not by scuffing with the grooves.