Every "box" on the Boatersland marine elegance page is a menu. The tall version is for installation on a head with a flat floor. Because it's a bigger toilet, it's more expensive than the short "standard" version intended to go on a raised platform.
The angled back is meant for toilets that will lie against a sloping hull . It's tall and the different shape makes it a bit more expensive than the straight back.
Bone is a little more expensive than white.
There are 3 flush water intake version: It's designed to use pressurized fresh water which has no intake pump..If you want it to use sea water, you'll need to add a remote intake pump. Adding the "sea fresh" kit will allow you to switch between fresh and sea water at will, but it runs the price up quite a bit.
And finally you have a choice of 3 flush panels: the basic push button switch that simultaneously brings flush water in and pushes bowl contents out, the 3 option "momentary flush" that provides a choice of flush water in and holding it ahead of use (recommended ahead of solid waste), simultaeous flush water in/bowl contents out and dry flush and the 4 option "Smart Flush" panel that provides the same 3 plus a 4th "full flush" that's actually 3 consecutive flushes (use very sparingly unless you have a large holding tank.). My favorite of all the flush options is the 3 option "Momentary" flush.
And btw...Boatersland is one of my favorite retailers. I've bookmarked the Marine Elegance page and several others.
I'll be glad to help you select all the right choices for your boat if you want to send me a PM.
--Peggie
