Imho Tears of the Kingdom is a much better game, in several ways. But in many ways it's BotW the remake, it's incredibly similar (not just game play mechanics). So if you want more and play a better version of it, I think it's absolutely worth it. But the only reason I'm playing and enjoying it is that I beat BotW years ago. If I had played them back to back I would have been fatigued.
(And I played XBC1, last chapter of 2, and 3 back to back and loved it. Felt the games were different from each other and that kept up the enjoyment.)