I was in similar situation but other way round. I didn't want 90% tints but only car available quickly had them, so I went for it as I didn't want to wait too long.
I was worried it would make it too dark in the back, especially as all the interior is dark ( I was coming from Leon FR which has a light interior) but it doesn't really.
I think the 90% tints make the car look good, especially white and red ones.
It depends if you want to wait