TLDR warning.
Some general thoughts about Woody, Gabe, maturation, and craft:
Woody's strength: he is bigger than last year, but he is still a gangly 19-year-old. When he picks up a cheap foul, or when he has problems finishing, it's largely a matter or two things: first, his slow footspeed, which is largely genetic, though somewhat trainable; second, his lower-body and core musculature hasn't caught up with his frame. Making an explosive movement in the post requires considerable leg, glute, and core strength, as well as balance. Woody is pretty coordinated for a seven footer. However, he is not strong, and won't be for another year or two. Muscle hypertrophy takes time. His upper body is also not yet developed, and this hurts his ability to finish in traffic. If you watch him, he knows what to do, he's practiced the footwork, he just doesn't have the physical maturity to do it against D1 players. Time will fix that.
Gabe is physically ready for the NBA. He's older, and has matured faster. Why is he the lesser player right now?
Easy. Woody's thousands of hours of high school and AAU ball. Gladwell's 10,000 hours thesis has been critiqued (but not soundly refuted), and his argument bears mentioning with the Gabe vs. Woody debate. Woody has been exposed to good coaching since he was a middle schooler. By his senior year, he'll be getting near that 10,000 hours of guided practice needed to achieve excellence (and if he makes the NBA, he'll need more work to take college excellence to the next level). Excellence, for the purposes of this argument, is the ability to perform at an all-conference level.
Gabe, on the other hand, started playing basketball at 14, and didn't have access to good coaching until he hit Sunrise Academy. With continued good coaching and a lot of work, he could be a backup NBA center when he's 24 or 25. If he has a Euro league coach who can develop him. If not, he plateaus his senior year at Iowa.
The odds are better for Woody to become a quality center because he's learned the game, and simply needs a year or two of physical development. Gabe, on the other hand, needs to spend four more years working diligently at mastering the craft of post play.