Sophomore Josh to Sophomore Sheden I will give you, but Sophomore Josh to Sophomore JJ is a bit of a stretch. Compare:
Year |
Rk |
Player |
G |
MP |
FG |
FGA |
FG% |
2P |
2PA |
2P% |
3P |
3PA |
3P% |
FT |
FTA |
FT% |
TRB |
AST |
STL |
BLK |
PTS |
2006-07 |
2 |
Josh McRoberts |
33 |
1164 |
164 |
327 |
.502 |
159 |
304 |
.523 |
5 |
23 |
.217 |
97 |
146 |
.664 |
260 |
114 |
39 |
82 |
430 |
2003-04 |
1 |
J.J. Redick |
37 |
1152 |
172 |
407 |
.423 |
70 |
149 |
.470 |
102 |
258 |
.395 |
143 |
150 |
.953 |
115 |
58 |
27 |
3 |
589 |
2003-04 |
4 |
Shelden Williams |
37 |
963 |
164 |
280 |
.586 |
162 |
275 |
.589 |
2 |
5 |
.400 |
138 |
200 |
.690 |
314 |
34 |
36 |
111 |
468 |
Shelden scored 38 more points than Josh did in 200 less minutes, but in 4 more games. To your point, the rest of their stats pretty much wash out - Josh being higher in Assists and Shelden having more blocks (although Josh was respectable there).
JJ, on the other hand, scored over 150 more points than Josh and was the #1 scoring option on the team as a Sophomore, barely edging out Deng for that honor. That holds up even if you remove ~60 points from JJ's total to account for the 4 additional games he played compared to Josh. Comparatively, a sophomore McRoberts was edged out by DeMarcus Nelson for the top scoring spot. Nelson vs. Deng isn't a fair comparison, but it's worth noting that JJ outscored Deng, while McRoberts failed to outscore Nelson. One other interesting comparison - McRoberts played more minutes than JJ despite the fact that JJ played 4 more games (35mpg to 31mpg).
Had Josh stayed 4 years, he might have equaled Shelden's contributions, and Shelden did end up with his jersey in the rafters (FWIW, I consider Shelden's honor due primarily to his defense and for his block title). That being said, I think it is highly unlikely Josh would have ended up as an all time great had he stayed 4 years without some help, which is kind of my point. If he played with JJ for 4 years the way Shelden did potentially, but that's too much of a hypothetical.
One thing is for certain. Had Josh stayed, he would have continuously been compared to Tyler, and I doubt there is much question that he would never have eclipsed that career.