I think Simmons is a very interesting player. I'm just not sold on having him run the Celtics offense. I'd obviously be fine with Greek Freak/Lebron as a point forward, but I think Simmons has a lot to prove before turning the keys over to him, esp. regarding the jump shot. Fultz's shooting ability is a better fit for this team's needs.
Neither Giannis nor Lebron have ever been good shooters through their careers.
Giannis has a shot 35% from three his first year, then went on to shoot 16% from three his year, 26% his third year, and 27% his fourth year. He's a pretty poor shooter, and he's not even close to the playmaker Simmons is, and Simmons is also a better ball handler, a far better rebounder, a better inside scorer, and a comparable athlete. He's a far stronger prospect then Giannis every was in just about every category (only exceptions being length and defense) so if you think Giannis is impressive, then Simmons will blow your mind.
Lebron shot 29% from three his first year, 35% his second year, 33% his third year, 32% his fourth year. His outside shot has been mediocre throughout his career, and he's shot 36% or higher from three only four times in his 14 year career. Physically, Lebron is a a little bit faster/quicker then Simmons, but Simmons is taller, is probably a better leaper (42" vertical) and has comparable strength to what Lebron had as a rookie. Comparing both players on draft day, Lebron was a superior ball handler, they are about equal as passers, they're about equal as scorers, they're about equal as defenders, and Simmons is a far superior rebounder.
Who was the last 19 year old freshman to average 19 points, 12 rebounds and 5 assists while shooting 56% from the field?
* Anthony Davis averaged 14 / 10 / 1
* Cousins averaged 15 / 10 / 1
* Blake Griffin averaged 15 / 9 / 2
Lebron and Dwight came straight from high school, so no college stats there to compare.
Lets be honest - nobody has put up all-round stats like that as a freshman in recent history.
Even Kevin Durant (who is an outstanding passer for a big) only averaged 1 assist per game as a freshman (to go with his 26 and 11).
Simmons is an unbelievable talent who has the potential to be an all-time great if he plays his cards right.
Fultz has a ton of upside and could also be an elite player, but I don't think his upside is as high as Simmons overall. Simmons is one jumpshot away from being a Lebron James calibre prospect.