So here's the pics of the low seat I have:
1) low seat main, just a pic for identification. Came off an 08, and I don't know if the embroidery is OEM or not.
2) low seat underside - if you zoom in there are no extra holes where it would indicate re-upholstery, so might be OEM
3) 2010 OEM and low seat, can't really see the thickness of the seats in comparison, but can see the profile difference
4) OEM measured - sitting roughly level, the grid of tapes shows the height about where my butt sits at 7"
5) low measured, about 5 1/4", but note the profile is very different
6) is just a close-up of the grid