UK Map coverage TomTom Navigator 5 GB vs TomTom Nav 6 europe

UK Map coverage TTN5 GB vs TTN6 europe
which is better, has most detail of the UK?
as i have TTN6 which i bought for a trip to france/germany. But after i returned home, i restored the TTN5 on my ipaq butam considering using TTN6
I`ve cross posted this on pocket gps but i might get a faster answer on here

I don’t think that there’s much to choose between them; Full postcode mapping was added in v5 (IIRC) so you should have that in both.

The main difference is that v6 is a bit more up-to-date - e.g. v5 does not include M6TOLL, v6 does.