Both incredibly nimble with the best body control and hand-eye in the world. Both get rid of the ball faster than anyone in their era. both single digit error guys, and though Ozzie played on turf, he'd be a single digit error guy on grass. Ozzie's arm, though, was only above average and toward the end was actually below average. Simmons throws 98.
Ozzie was always in impeccable shape, as is Simba, but Simba is 6'3", while Oz was probably 5'9", though I'm sure they listed him taller. Although Oz got all the press, Omar might have been better. But yes, Simba is better than both. We'll have to see if he's better for 20 years.