Spinks is in the running for the "best" H2H LHW in history (not necessarily the greatest/that's different). Bivol simply does not have the resume or pass the eye test when compared to Spinks to even call this anything more than a win for Spinks. I can see Spinks outboxing him or beating him up.
Spinks will win a clear decision but I can see Bivol going the distance. He has very good movement and judgement of distance
I agree Spinks is better but I think Bivol would have a better than 50% chance of hearing the final bell.
Bivol was badly rocked by Joe Smith. Lucky for him, Joe Smith is a scrub. What other notable puncher has he faced? There's a VERY high chance Spinks stops Bivol. If you can't keep the 175 Spinks off of you, you have big problems, and Bivol lacks the firepower to keep Spinks off of him.