Which version of Bumblebee? The old Titans original (no shrinking, science genius in a suit with blasters, glue & hypnotics)? The cartoon version? Doom Patrol stuck-shrunk version?
Depending on the version, I would go with Wasp about 70% of the time in a straight fight. But I think Bumblebee has a strong edge in anything strategic or smarts related. Bumblebee was never a front line butt-kicker, the tech and science skills were her forte.