Footprints
It's highly unlikely that any current toilet will have exactly the same footprint and fit he bolt holes of its own predecessor, much less fit that of another brand...and that's the last thing on which your should base your choice of toilets...it's a bit like basing your choice of a new boat on whether the sheets you bought for the current v-berth will fit the one on the new boat.Choose the toilet that you like, that fits your space and budget...and count on having to do a little sole refinishing in the head.