Interesting, two rappers infamous for bad doubletime. Heh.
Blest V1 - Doubletime diss is brought down by the bad doubletimed garbage bag line. Rampant line is solid. Lots of filler though.
Byron V1 - Gay joke is fucking awful. Mic back flip is alright, where do I start is strong, on beat diss is solid but relative to Blest.
Blest V2 - Gay flip is okay. Rhyming superior with inferior is awful. Oh yeah, and then you called him a faggot. Boss diss is okay.
Byron V2 - Gay flip is lame but still better than Blest's, Tupac flip is strong. Lightswitch line is nice. Pee on a tree line is great, does a lot of damage to Blest. Not the best/way better than you is very true since Byron doesn't deliver perfect doubletime but still does it better than Blest.
Blest isn't bad but a lot of his lines end up hurting him more than helping him. Byron's last verse sways the battle in his favor very heavily.