Below is a through bodied porcelain tile. IE the contents of the tile are the same all the way through (a homogenous mix)
We put the nice face forward on the exposed edges and the cuts to the back.
If you cut straight grout does hide a multitude of sins.
All I would say on porcelain (to everyone!) is.... Dont forget your drill bits.
But then as we sell drills then I would wouldnt I !!!