I think Chicago can make the biggest gains but agree both should be interested. I get the feeling from Lowe and others that Atlanta isn't as involved currently but things can change. Their view... right or wrong is that Capela gives us some of what Rudy does but at half the price so lets look to do something else. I keep hearing Trae and Clint are also close which probably matters to them as well.
I think the current sentiment... that its Chicago thats the favorite (if we trade him) is likely correct. I don't see an acceptable deal without Williams. I get why they want to keep him but to go from Vuc to Rudy on a team that has good defensive wings... and has deep playoff aspirations... they should go even further than Williams, Vuc, White, 18 if its necessary.
The Hawks are definitely high on Capela. If they are happy with him, can't do much about that. But Rudy is a massive upgrade and well worth the money even if they don't think so themselves. I also think ATL has the assets to go after Ayton, they are kinda loaded, so they have options besides Rudy that they are probably happy with. Okongu is the third option that might be the best of all of them.
CHI....they don't really have other options to get better. Williams is a good prospect who can get a lot better and/or be used in a different trade, but I don't think there's a realistic option besides Rudy to improve the defense the way they need to. I believe the same is true for ATL....but CHI is in a tougher position with less assets and options.