At times Tatum reminds me of Jamal Crawford.
I really don't see it.
They both have pretty long arms, but that's about it.
Two things stand out to me:
1. Both of them need only the smallest margin to get their shot off; yet they still manage to be able to score consistently on contested shots. This is a rare commodity.
2. Both of them are willing to shoot anytime, from anywhere. Thus they are a threat to score in many places that other players aren't.
I get that they are different positions, but they still remind me of each other (at times).
I disagree with both of your similarities.
Tatum is good at creating space with his footwork and length, but he's not a quick fire guy like crawford. He also isn't a chucker like Crawford. He can and will take a shot from any area of the floor sure, but he doesn't just chuck.