They are close in age. Both Top 2 PGs in the league.
Barring Injuries, they will be the Top 2 PG this decade presumably
They are also consistent MVP Candidates this decade. Just losing to Bigger Better players in Joker and Giannis. And Arguably Embiid too.
But speaking of MVP.
Who do you think will win MVP first? This decade.
How about FMVP?
Do you expect them to a standard tha both of them should win MVP or FMVP this decade to early 2030s?
Defense at the least important defensive position is what puts Shai over Luka? Also basically having the least injured team in the West is what how they were able to finish 1st