In short I think
If you want to run 0.30g bb on bio, run Green Devil
If you want non-bio or heavy weight (0.36g, 0.40g, 0.43g) run Bastard
If you want to save money and your gun don't mind run Green Devil
The biggest complaint I have against Bastard is the cost, they're more expensive than Green Devil in the bio sector, My gun runs fine on both, I went with Devil because its cheaper.