My buys: 1-pc WC Baron (W303) vs 2-pc Claytan (WC4506)
1) Aesthetically, the 1-pc looks sleeker and classier as compare to 2-pc WC. Wanted something better for MBR toilet and gotta a simple one for the common toilet since we wouldn't be using it often. Price wise, 1-pc is much more expensive than a 2-pc WC.
2) A MUST to sit on the WC when buying. Although my 1-pc was more pleasant to look at, the seat feels much smaller and narrower than the 2-pc. Unless you needed to trim those muscles at the bum. :P
3) Flushing. Single flush, dual flush? I read on forum that PUB only allow sale of dual flush systems (
4) Soft closing seats - forget abt it i say. We didn't specifically asked for it, but thought it was a gd to have feature if it came free. But i'm getting a little more irritated each time I need to wait for the seat to 'descend' slowly. And in the long run, the soft closing usually wears out. Replacement of these seats are more expensive than the normal covers as well, and eventually i'm not surprise to find myself buy a normal seat as replacement. There are some who absolutely hated the slamming sound and would list this as one of their must-get.
Some listing of WC rating found here.