Now I drive an altera XL for work which is basically a more spacious Leon and the inside feels no better built than my gen6, just as much plastic, the hand break is on the wrong side too which seems to be a common thing on cars now days that are originally designed for left hand drive
Don't get me wrong it's a lovely car to drive and I do think new Seats look very pretty but they are not built any better than the Toyota and they are far more un reliable apparently, Toyota finish 2 beaten by Honda in 1st where as vw/Audi/Seat at the wrong end of 10 and up
I can't speak for the 7 as I haven't owned one, maybe they cheaped out inside them but, you also have to factor in they are two totally different machines. But end of the day it's what makes the driver happy.