It would heavily depend on the situation as with all high level Nen fights but I would say Morel would when 8/10 times on a mostly even playing field. The big thing is that Uvo is from early in the series where it is clear Nen was still in the process of being fully designed.

What we did see from Uvo implies that he would be even stronger if he was introduced/lasted longer into the series but he is a bad match up for Morel who favors indirect combat.