Don't think he was close to being as good as Sabonis when it came to players who spent a significant amount of time outside of the NBA. His offence was pretty much only volume scoring and his defence was porous from what I've heard.
Yeah, I believe Sabas was the better player between the two. Scmidt was an elite shooter+scorer, but his defense and his court vision left a lot to be desired (at least from what I've heard). As crazy as it sounds, prime Sabonis had literarily no weakness in his game. I mean, if you think about it, pretty much all the GOAT candidates had at least one weakness in their game.
Jordan: average 3pt shooter
Magic: average D + average shooter
Bird: way below average athleticism
LeBron: average shooter + his D has declined in the recent years (although I bet he can still play elite level D when he's into it)
Shaq: non-shooter + average court vision
Wilt: free throws + long distance shooting
Kareem: long distance shooting
Dream: court vision + long distance shooting
Russell: probably the best defensive player ever, but his offensive game wasn't anywhere near the same level
I get that big men weren't supposed to shoot from distance till the emergence of small ball in the recent years. Thing is, Sabonis wasn't supposed to shoot from distance either, but he did anyway! He famously hit 4 three pointers in the semis of the 1986 FIBA World Championship against Yugoslavia. A thrilling game to say the least! The Soviets were down 9 points with 1 minute to go. Sabonis spearheaded the Soviet comeback with a three pointer to cut the lead to 6 points. One of the greatest comebacks in basketball history!
Maybe Oscar Robertson and Jerry West had no real weakness too? Can't say I know enough about their game to be honest. I've heard people questioning their defensive impact, but then again I've read stories like these:
Prime Sabas, Oscar Robertson and Jerry West might be the only players with no holes in their game.