I think it is fair to think that the next generation of basketball players will be better than today's. While I think MJ>Lebron, I think there are decent points for Lebron (size, power, career longevity, impact on community). I'm still going with MJ, but it's a conversation.
I feel the same way here. Tatum is quicker, taller, more talented offensively, and even better defensively. That being said, I think he needs a ring before we can say he's emphatically better than Pierce. Hopefully Tatum gets his earlier in his career than Pierce.