Hi

One other subtle point:

Some printers have heated beds, some do not. On a heated bed printer, the properly heated area is what sets the size of the build platform. On a printer with an unheated bed, the size is a bit more arbitrary. Comparing a heated bed to an unheated bed may leave out the "what if I don't heat the heated bed printer?" option. In the case of the printer in front of me, the bed would go from 12x 12 to roughly 13.5 x 13.5. I feel that having a heated bed is a needed thing on a printer. Some manufacturers don't seem to agree.

The same issues that make a Delta print a cone, also mean that it actually prints something other than a circle at the base. It is possible to have an odd looking print area on a Delta and get a bit more "area". The obvious question is how useful that area is.

Bob