It's just laughable watching people comparing Dembele to Neymar,
[youtube]93Va6TZhmDQ[/youtube]
Neymar's a technical prodigy. This goal showed all the required skills necessary to succeed at Barcelona. Quick thinking short passing, comfortable in tight areas, excellent close control, excellent dribbling, vision, and technique. Neymar excels at all of this.
[youtube]DedFb25ThgY[/youtube]
If you think Dembele can reach this level of composure in his passing and technique within a year or two (Neymar was 23 in the video), then your optimism is justified. If you think Dembele has shown the pre-requisites (inherent ability) to reach half this level of passing and movement, then your optimism is justified. I think he lacks the inherent ability to even reach half of Neymar's intelligence and technique on and off the ball.
He's slow with his decision making, off the ball movement, and his passing in short spaces lacks precision.
These are things you can't really show with stats. Once again, use your eye and use stats to complement and substantiate your argument. Don't just blindly look at stats and use that to judge a player.