We went with the tech8s over the 7s because the 8 still has a conventional sole, not bonded like the 7, and the 8 has an inner bootie and the 7 doesnt.
The bootie means that the 8s were alot more comfortable, the 8s have a sole with a replaceable insert but still have the stitched sole, so they will grip somewhat while walking, compared to the bonded sole on the 7s.
Although you probably already knew this
Ill post up what dad thinks of the boot when he goes for a ride....