I have both, two Bushbows, one osage limbs and the other hickory, and a Lil Creep which is always bamboo. The Bushbows are both 62", and all of them are 57#.
The Bushbow is more stable for two reason. It's longer and the limb woods are heavier. The Creep is much lighter, overall, and the bamboo recovers more quickly, so it's noticeably faster.
My conclusion? The Bushbow instills more confidence for me. I like the Creep, but the Bushbow feels more trustworthy, if you get my meaning.