If you look only at the aggregated past, then the answer is "of course Sully is not comparable to Love." Thing is, things change. Constantly. Players improve. The good ones, constantly. I'm much more interested in how Sully will perform THIS SEASON compared with Love, than in their relative pasts.
Some may believe that past performance indicates future performance. That is clearly not true when speaking of relatively-new NBA players. They improve, constantly.
And Sully till now has been hampered by injuries, first with back surgery, then his hand, etc. This coming season is his first "clean" one (fingers crossed).
So what is the best data we have right now to help inform our JaredS crystal ball gazing? Well, imo it's this preseason.
And if we look at this preseason, Sullinger is outperforming Kevin Love. Kevin's claim to fame lies in his 3pt shooting and rebounding. At rebounding, Sully is WAY ahead of Love right now. Sully's per-36 rebounds are 13.84 (2.97 offensive, 10.88 defensive), while Love's per-36 = 10.73 (2.48 offensive, 8.25 defensive). Sully's Total Rebounding Percentage is 21.38%. Love's is 16.97%. (Source: RealGM)
I.e., Sullinger is rebounding approximately 25% better than Love right now.
And re 3pt shooting: Sully's hitting them at 53.8%, Love at ~58.8%. Close.
What about defense? I don't think anyone believes Love is better than Sully there. Quite the opposite.
So -- bottom line: IF things continue as they are unfolding RIGHT NOW -- Sully will outperform Love this season.
Of course, preseason might not carry into the regular season. That's obvious. But it very well might. I think the odds are that it will carry forward. Heck, if anything, Sully is likely to KEEP IMPROVING. I don't think Love will.... certainly not as much.
So the answer here is the opposite of what it seems to be at first glance. If current trends continue -- yes, Sully will be "greater than" Love. This season.
(Oh, and btw: if you think Love's a better passer, etc., look at their relative assist numbers so far: Love AST% = 18.67, Sully's AST% = 21.83. Just sayin)