Here are Josh's numbers from the combine compared with a few other prospects who are seen as mid-to-late 1st rounders in most mock drafts.
Measurements (body fat%, Hand length and width, height w/o and with shoes, weight, wingspan, standing reach, birthdate)
J. Okogie - 5.20, 9.00, 9.75, 6'3, 6'4 3/4, 210.8, 7'0, 8'6", 9/1/98
Z. Smith - 6.05, 8.75, 8.25, 6'2 3/4, 6'4, 198.6, 6'9 3/4, 8'4", 6/14/99
D. Divencenzo - 5.00, 8.25, 9.00, 6'3 1/2, 6'4 1/2, 200.6, 6'6, 8'1 1/2, 1/31/97
J. Robinson - 6.05, 9.00, 10.00, 6'4, 6'5, 188.4, 6'7 1/4, 8'2", 2/22/97
Due to Okogie's huge wingspan he has a higher standing reach than any of the 4. He is also the second youngest with only Zhaire Smith being younger. He also has larger hands and is the most well built.
Next are the agility numbers - note that Robinson did not take part in any of these. numbers are either in seconds or inches
(lane agility, shuttle run, 3/4 sprint, standing vertical leap, max vertical leap) - placement among all tested players in parentheses
J. Okogie - 11.08 (20), 3.03 (8), 3.04 (1), 33.0 (4), 42.0 (1)
Z. Smith - 11.02 (16), 3.15 (24), 3.05 (2), 33.0 (4), 41.5 (3)
D. Divencenzo - 10.72 (6), 3.12 (20), 3.11 (10), 34.5 (1), 42.0 (1)
Okogie tests as well as or better than Smith and Divencenzo. He is top 8 or better in every category except lane agility. You can make a strong argument that these are the top 3 athletes at the combine. Definitely the top 3 jumpers. Okogie was also first overall in the 3/4 sprint.
Shooting - only Josh and Divencenzo took part in the shooting drills - both Smith and Robinson skipped them.
in each spot the player takes 5 shots with the percentage made from 0% to 100%.
The shooting spots are - NBA Break Left, NBA Break right, NBA corner left, NBA corner right, NBA Top key,
second set is 15' break left, 15' break right, 15' corner left, 15' corner right, 15' top key
J. Okogie - 40, 80, 60, 60, 80 - 100, 100, 80, 80, 100
D. Divencenzo - 40, 80, 40, 60, 80 - 100, 80, 100, 100, 80
You can see that the 2 hit almost exactly the same percentages across the board. They hit exactly the same number of shots from 15 feet and Josh hit one more from NBA range
Finally, here are the college stats for each player for their careers. Note that other than the shooting % they are based on a per 100 possession number to mitigate differences in tempo.
I also included full college career for FTM-FTA and 3FGM-3FGA
FG%, 2 FG%, 3FG%, 3FGM-3FGA, 3FGA per 100 poss, FT%, FTM-FTA, FTA per 100 poss
Okogie - 43.7, 45.4, 38.2 (66-173, 5.0), 77.7 (313-403, 11.8)
Smith - 55.6, 57.4, 45.0 (18-40, 2.2), 71.7 (91-127, 7.1)
DD - 46.9, 57.3, 37.8 (130-344, 6.4), 70.5 (134-190, 3.5)
Robinson - 45.0, 48.8, 37.6 (159-423, 7.7), 75.5 (308-408, 7.5)
Josh has the lowest 2FG% of the 4, it's his one big weakness - finishing at the rim. Smith has the highest 3FG% but it is on very few shots, so whether it would continue is questionable. Josh has the best FT% and also the most attempts per 100 poss. Divencenzo does not get to the line much. Smith's game is that of a driver right now. Also note that both Josh and Jerome Robinson were primary options while DD and Smith were not. So Smith and DD would face lesser defenders and be able to pick their spots more on offense.
finally, other stats on a per 100 possession basis
Total rebounds, assists, steals, blocks, TO and then the offensive and defensive career ratings.
Okogie - 10.2, 3.5, 2.6, 1.5, 4.0, 109.3, 99.1
Smith - 10.3, 3.7, 2.3, 2.3, 2.3, 128.7, 95.1
DD - 9.3, 5.5, 2.1, 0.5, 3.7, 117.5, 99.7
Robinson - 6.3, 5.4, 2.1, 0.4, 4.7, 104.6, 107.8
smith has both the highest offensive and defensive ratings - though his offensive one is affected positively by his low shot totals. Smith and Okogie are strong rebounders as is DD, Robinson is not.
DD and Robinson are good passers. Robinson is a poor defensive player.
Overall, you look at all these various numbers and you can make an argument for taking Josh first among them. If you take Smith you are taking a pure gamble on a great athlete who might develop.
Robinson is largely an offensive shooter. He is thinly built and doesn't play good defense. DD is a very good offensive player who has the potential to be a solid defender as well. Okogie has the best measurements for being a strong defender given the combination of his size and athleticism. His offensive stats, especially his 38% college 3FG% and his 78% FT give you potential for being a solid offensive option as well.