He is a very different offensive player but nothing so far says he's a worse offensive player in the middle of his second year than Payton was.
A selection of Gary Payton's performances in January of his second year in the league. (all games between 1/13 - 1/25)
15 points, 8 assists, 3 rebounds, 6-10 FG 3-4 FT
12 points, 6 assists, 3 rebounds, 2 steals, 6-15 FG
19 points, 3 assists, 5 rebounds, 2 steals, 9-16 FG 1-1 FT
20 points, 6 assists, 5 rebounds, 2 steals, 7-18 FG 6-6 FT
14 points, 10 assists, 1 rebounds, 1 steal, 6-12 FG 2-2 FT
17 points, 7 assists, 8 rebounds, 3 steals, 8-12 FG, 1-2 FT
19 points, 8 assists, 4 rebounds, 2 steals, 9-13 FG, 1-1 FT
All I did there was turn to the game log for Payton's sophomore season and look at a stretch of games from the same point in the calendar.
Payton wasn't very consistent at that point in his career, of course. If you look at a stretch of games right before that, he was putting up lines more like 8 points, 4 rebounds, 4 assists, that sort of thing. But the point is, he was showing that star potential for weeks at a time.
Do you think Smart is capable of putting up a stretch of games like that right now? I don't. So I disagree, there's a large difference between where they were offensively at a similar point in their careers.