Garuba has a great wingspan and he really can stay in front of his man, moves well laterally and is a solid rim protector. One thing I can see that he would instantly help the spurs with is rebounding. He's ferocious on the boards. Offensively, I think he has potential because his free throw form is not all that bad despite his inconsistency at the line - and he can hit the three from time to time. Still, his offense is mostly dunks and layups-and his passing, which is surprisingly good. He's a good athlete but I'd love to know what his vertical is at. I would rather have Garuba than Kai Jones or Isaiah Jackson.
Sengun is the exact opposite. Solid on the offensive side of the ball, with the potential to become a solid three point shooter because he's a good free-throw shooter and can hit the three, but he has a strange shot so he'd need some time with Chip. He has great footwork in the paint and gets to the line a lot. He's nowhere near as athletic as Garuba (or the physical specimen) but this shows up more on the defensive side. I also think Garuba is the better passer.
Also, I think Garuba would be able to contribute more minutes right away. And his level of compe ion, playing in the Euro League, is clearly better than the level of compe ion Sengun has faced.
As a fan, I know the Spurs need offense but Garuba can really help the Spurs when one considers just how many points in the paint the Spurs gace up last season. Garuba would really help the team in two areas where the team suffered too often-rebounding and rim protection.