The DTG version is of the Class 142 as they were released with the old style doors.and is £11.99 The AP version has old and new styles and 11 different liveries and is also £11.99 But I don't know if the AP has interior Passenger views
You only want stuff with passenger views? The AP 142 is awesome. It has no passenger views though. The DTG version also looks great, and possibly has a nicer looking cab... but it has limited liveries and versions with it, and also sounds rubbish in comparison to the AP version.. but it does have a passenger view however.. but it looks bloody awful. Personally, I'd get the AP version.
From the AP page: "FREE BONUS The sounds featured in this pack will also install to the class 143 included in RS.com's Riviera Line: Exeter - Paignton route if you own it."