Lyrically this was entertaining and pretty close, so good job to both of you on that.
My vote is decided because of one thing- Mic Presence.
Bummer never went off beat, while Spawn did it consistently, and I'm sorry but the audible breathing fucking kills it for me. Dude you would be so much better if you stopped (or even edited out) the breathing. You're a good rapper Spawn, and I respect you as an emcee, but that's gotta be fixed as much as my vocal mixing does. It's all good though, we're all here to get better, and we all will. My vote goes to Bummer for dope lines and on point delivery.
Great battle fellas.