If you intend to build either of these kits - why not follow the superb online builds of both the Class A and Class B versions in the galleries on Simon Varnam's website
Wagon Transfers
Note that transfers are available for many of the wagons featured in the MMP range such as ZEV Catfish, ZFV Dogfish, 35.5 Ton Tank Wagons, 16 Ton Mineral Wagongs and others from - Cambridge Custom Transfers.