The only difference is that with TomTom you get 4 map updates for € 36,00 and with Pioneer I get 1 update for € 159,00. Thats a € 123,00 difference for LESS updates.
So Pioneer is ripping of their customers and if I new they had this bad update support I would never had bought a F900BT.
Than there's also the very poor Remote control support with a Seat can bus steering wheel. The still way to long boot time and the stupid and illegal traffic jam avoidance routine that lets you drive on and off highway exits, gas stations and rest stops, to drive "past" traffic jams. This is all illegal