I think this a good question.
Firstly, majority of the Iranians on the old board held Yazdsni as an underdog. One of them was quite "unique" in the way he posted.
Yazdani definitely is the underdog as Taylor has convincingly proved himself the better of the two. Not being a Taylor fan, this fact irritates meto no end. I feel Yazdani can win with strategy. His cardio is not up to Taylor's, so he needs to find a way to stall and manage the matches. Additionally, Taylor is older so he might slow down a bit.
Either way it is a match to look forward to.