There are differences and (especially) the 3x 8pin cards can do a lot more but for example here's a weird thing, the TUF OC with 2x 8pin can do 375W (pl max, doable, many 2080ti before had the 380W bios and even more) and on the other side the MSI X-Trio with 3x 8pins only does 320W (340 PL maxed out).
Come on MSI, you can do better, it's your flagship model (even with less gpu phases than the TUF) .![]()
MSI RTX 3080 Gaming X Trio has a plastic backplate, fail.