I really like both of these teams and its hard to poke holes in them.
Ironically the Suns team is very reminiscient of the 2021 Bucks championship team that beat the Suns in the finals. That team obviously had Giannis and Lopez in it with the difference of Jrue, PJ Trucker and Middleton starting at 1-3 in the playoffs instead of White, Caruso and JDub. The biggest questionmark I have for this team is whether JDub is ready to step up or not, since White and Caruso arent really slashers or high volume self-creators, so for the spacing concept to work as intended they need JDub to handle the ball on the perimeter and attack a lot more than he does behind SGA.
The Kings team has more ballhandling with Brunson, Scottie Barnes and Embiid all being great on-ball creators. White and Caruso could make life difficult for two of them but Brunson has shown that he is tough to stop 1on1. Its hard to analyze this team without the writeup since I dont really know how they would operate on offense. I'm assuming Scottie Barnes is playing mostly off the ball but he isnt really a great off ball player so I dont know what to make of him. I think Barnes can be a great defender but since he isnt a shooter he may muck up spacing a bit here with JJ also not being a bonafide shooting threat.
So JDub being able to handle the load vs Barnes being effective in his role is the seesaw in my eyes that could go both ways. However both teams are great and its a close matchup, and ultimately for me the deciding factor here was championship pedigree, which clearly favors the Suns team.