Hi. I think your approach to comparing these two players is skewed.
Ok, first off, I'm going to admit that the stats don't tell the whole story here. Smart is the typical "no-stats all star" type, a la Shane Battier, and it would be foolish to judge him on stats alone.
That being said, we'll just start off with the stats
Hah.
. Smart lacks explosiveness and has no off-the-dribble moves to get to the rim. On offense, he's simply a spot-up shooter and a poor one at that.
Smart might not be as quick as Rozier, but he gets up in a hurry and has decent leaping ability. He also has greatly improved his handle and when you combine that with both his size and his strength, he doesn't have difficulty getting to the rim. His problem is finishing at the rim once he gets there. Also, you are COMPLETELY passing over Smart's contribution initiating the offense, making the right calls, his clutch shooting, his passing ability, and his ability within the pick and roll when you peg him as a poor spot-up shooter.
Three years in, there's strong reason to believe that Smart will always be offensively inept
2 Years and 17 Games. And yeah, his shooting %s have stayed the same or gotten worse. He DOES need to improve his shooting, but calling Smart "offensively inept" is bogus. Marcus Smart is roughly the same age as Kris Dunn. If Dunn can improve his shooting, Smart can too. Just because he's been in the league a year or two doesn't mean he's hit his ceiling. Look at Crowder (shooting, driving), AB (passing, dribbling, shooting) , or Horford (3 point shot) for examples of players who have been in the league a while yet still grow year after year. I would like to hear a "strong reason to believe" that Smart will never progress.
Is Smart's defense enough to make him more valuable than Rozier?
Currently, yes. Smart defends at an all-star level. Rozier does nothing at an all-star level. Both are 22.
In terms of matching up against guards, I'm not even sure that Smart is currently a better defender than Rozier. And it's just Rozier's second year.
You lose all credibility here. Smart is undeniably a better defender than Rozier, even though Rozier is a strong individual defender with better quickness. Defense is not played 1v1. It's played 5v5 and Rozier often has breakdowns in the team scheme that lead to easy buckets.
Smart also has managed to demonstrate stretches of low basketball IQ as well as a lack of effort in developing his shot and getting in shape.
I'm not sold on the low bbiq claim. His court vision and propensity to be in the right place at the right time argue strongly against that. He does get heated and occasionaly let that cloud his judgement. I can live with that. He's 22. He's not a veteran even if he plays like one most of the time. He'll learn.
I'm not sure why you think he's overweight. It looks to me as if he's bulked up a bit to help play the 3 (which he's been called on to do a lot of this season). Smart is not out of shape.
Rozier might ultimately be the better player.
Maybe in a few years, but right now Smart is better at everything except shooting.
Rozier has made major strides in his first year. That's something to be super excited about. Personally, I like Smart and Rozier playing together in the same backcourt, with Smart handling the ball (as Rozier tends to overdribble and kill the ball movement)
Smart was a 6th pick, Rozier was a 16th (and one that many bemoaned at the time). Smart's expectations and skill levels were higher than Rozier's at the time they entered the league. They are still higher even though Rozier has maybe become a better shooter(?) (sample size of 17 games)
Let's hope both improve, but Smart is clearly both the better player and the better prospect currently.