Well you'd be right, but its a bit of a +/- with ST and G
With the ST, you get 3D and the better filter (so better contrast, less glare)
With the G you get THX preset, more calibration controls and can record to a USB. Also i cant remember if the G has DLNA (unlike ST)
Also, they look different so that might play a part.
I'd probably see if you can view them side by side in a demo room