Arnt bouncers much weaker than rosies? Bouncers hit very slowly, taking several seconds to hit again. Where as rosies shoot constantly, and have distance. Rosie would probably win then, but still a good fight.
I don't think so..I've once arranged Rosie vs Rosie fight..(hypnotize BD, attack another). Their hits were very weak (due their armor, I'd say), it taked long time until one killed another.
Bouncers have stun-attacks - your vision blurs (with High Detail Post Processing turned on), you move very slowly. I don't know if it would work against other BDs, though. And bouncers can run quickly, finishing their dashes with destructive shoulder-hits. Only problem is, if he miss his dash, he is vulnerable for few moments until he turn - ideal time for Rosie to throw on him few mines.
I imagine this situation:
Buncer: "GROAR!"
Rosie: "Grrrrr...graaagh!"
Bouncer: ".... ..... GRRR!!" <point his drill on Rosie>
Rosie ".... URRGH!" <aim his rivet gun on Bouncer>
Bouncer: <duck a little, then he starts running>
Roise: <start shoting and going backwards>
Bouncer: "STOMP, STOMP, STOMP" <hit chair standing near him with his drill while dashing>
Rosie: <stop shooting for a while, smack down chair flying on his head>
LS: "Kill him, Mr. B! Kill Him!"
<while Rosie was playing with chair, Bouncer got very close>
Just meter away from Rosie, he jumped. With all his weight and kinetic energy on his side, he smacked down Rosie. Rosie's hits with fist/Rivet gun are effectless against Bouncer's armor.
Bouncer: "GROOOAAAH!" <raises his drill, turn it on and bury it deep inside Rosie's head><blood, brain, adam and oil sprays all over>
That's one of ways I see it;)