If Usman wins
- he will be an uncharismatic champion that will dominate the division. People wouldn't doubt fighting aspect of his but he will not be P4P the most charming fighter/drawer. He can used that African angle, or his family man side of him for a good exposure/marketing however.
If Colby wins
- it will surprise MMA community. Casual that tuning in probably will hate his MAGA shticks (expect a lot of elaborate twitter hate threads by people who aren't actually watching the sport.) Colby probably will have more funny promo/materials to be unveiled. His marketing hustle probably will eclipse his fighting chops.
Politics aside:
I don't expect Trump to win in 2020 election, but Labour Party in UK just had one of their biggest lost to Conservative Tory party (whether conservative still has uprising influence among the people or that it was Corbyn that lead Labour to its downfall.)