Big difference between a B player at 9B vs a B player at 14.1. Hell, a lot of A players at 9B may never run a 100 playing 14.1 simply because they don't understand the pattern play. Most of the better 9B players I've ran into in the pool rooms I couldn't beat playing 9B, but I robbed all of them talking them into playing 14.1 because I had the cash in my pocket they wanted, so they were all willing to play MY game in order to make some money off me.
Thats the thing about gamblers, they'll try and get you to play them at their strongest game first, but they'll play your game as well if they know you have money, and refuse to play their game, they WILL play 14.1 just to try and win some money because they hate to see you walk out the door with that money in your pocket

even if they don't understand the game