I've been reviewing the profiles of both Iowa and Gonzaga and a few things jump out.
1) Everyone knows both teams like to push the pace, but only one of the teams appears to try to slow the other team down: Both Iowa and Gonzaga use 14.4 seconds per possession, but on defense, Iowa is forcing teams to use 17.5 seconds while Gonzaga only forces their opponents to use 15.8 seconds.
2) The Zags tend not to aggressively hit the offensive glass -- they only rebound 29.6% of the opportunities. Iowa, by contrast is rebounding 38.5% of their opportunities. That however, may get negated, as our defensive rebounding is poor (allowing 35.7% offensive rebounds while the Zags only allow 25%).
3) Gonzaga does not shoot a lot of free throws, and they give up a lot of free throw attempts. Can Garza get them into deep foul trouble? Drew Timme commits only 3.8 fouls per 40 minutes, but their backup center (Ballo) commits 9.1 fouls per 40. Their next tallest player (Watson: 6'8'') also commits 5.8 fouls per 40. For reference, Garza draws 8.6 fouls per 40 thus far.
All in all, I think that these nuggets actually bode well for Iowa. I think Garza will feast on the offensive glass, draw a lot of fouls and get their bigs having to play soft due to foul trouble. I think that if they do commit players to the offensive glass to try to take advantage of our weakness, we'll be able to score more than we already do in transition, and if they don't; they aren't exploiting our weakness. If Garza can draw a lot of fouls, it will also allow him to get cheap breathers while shooting free throws and allow him to play more minutes than a game with less stoppages.
Based on this analysis, I'll go with:
Iowa - 92
Gonzaga 86