Tile-ready bases are definitely sturdier, but yeah, the subfloor has to be dead-on level or you’ll fight it the whole way. I’ve seen a few composite pans where the drain area wasn’t perfectly flush, and that’s where leaks can sneak in if you’re not careful with the seal. Mud beds are more forgiving if your floor’s out of whack, but they’re messy and take longer to cure. If you’re comfortable with a bit of extra prep and double-checking your drain connection, tile-ready can save time overall—just don’t rush the leveling part.
“the subfloor has to be dead-on level or you’ll fight it the whole way.”
Can confirm, nothing like thinking you’re done and then realizing your spirit level’s lying to you. With tile-ready bases, I always double-check the drain fit before setting anything in stone (well, in thinset). If your subfloor’s got dips, it’s worth grabbing some self-leveler first. Rushing that part is just asking for a puddle under your pan... and trust me, fixing that later is a nightmare. Mud beds are forgiving, but man, the mess—my boots are still traumatized.