Anthony was much more athletic than Tatum. Nobody sees that?
Um, no. Anthony was never considered an explosive athlete. He had a great first step because he had the strength Tatum right now lacks. He came into the league about 230 while Tatum is maybe 205.
The reason why Tatum is compared to Anthony is they are isolation scorers that can face-up, score in the post and thrive on making tough, two-point jumpers. Once Tatum adds weight he will almost be a Carmelo clone. The Pierce comparisons are a little lazy cause Tatum is bigger. He might end up 6'9" 240.
When they dunk, Anthony's elbows were at the rim. Tatum's wrists get above the rim.
Um, no. This is a weird and silly way to determine athleticism. Now here are actual stats which always trump made up nonsense.
At the 2003 NBA Pre-Draft Camp, Anthony had a standing vert jump of 30.5" and a Max Vert of 33.5". He measured 6'7 1/2" with shoes and was 233lbs. He was 19 and already physically mature and he would play at 230-240 for most of his career.
If you read that Anthony had a 41" max vert jump anywhere it is bogus. Sort of like Andre the Giant being 7'4". 33.5" was his max vert jump. To give you a comparison this pre-draft camp TJ Leaf, who is considered a mediocre athlete, had a 34.5" max vert. Semi Ojeleye had a 40.5"
Carmelo was not a great leaper and even worse was a slow leaper. He usually led all forwards every year in getting his shot blocked. He was most effective with a running start from outside the lane where he could use his superior strength to dunk.
Can Tatum beat 33.5"? Well we don't have any stats on him but I would stay it is highly likely he would be higher than Carmelo. But we don't have anything to back that up right now.
The players Tatum most compares to are Anthony and Parker. He is an inch taller than Anthony and the same height as Parker. He has a greater standing reach than either and a comparable wing span. The difference is that Anthony was 233 entering the league and Parker was 240. So Tatum has to add weight. I could easily see him at 6'9" 240 for his playing career and like the others be a 3/4 hybrid.