Great points above^^^
Maia's chain wrestling is much different than Jacare's. I will fully admit that I thought Jacare would have more success taking Wittaker down but if you look at Jacare's physique it has changed since USADA. Maia's age for sure is a concern (as was Jacare's), but Maia has never relied on strength and explosion to get TD's like Jacare does. If USADA is a factor with Jacare (along with age), I'd be much more surprised if it is with Maia. His body hasn't changed, and he relies purely on chain wrestling technique to secure TD's.
That said, Masvidal might be a better athlete and counter-wrestler than Whittaker so while I really did favor Maia initially, my lean isn't nearly as strong as it was. Father Time is and always will be undefeated, and Maia is at that age where it has to be taken into consideration.