To be totally honest, considering the Tamiya T-62 kit has problems to begin with, if you are not too picky, the verlinden set will be ok. If you do a lot of research on the T-62 and know it well, it might bug you, but the Tamiya kit will probably do the same anyhow...
However, there is no rule saying all of us nut/bolt guys have the LOOK/FEEL of building the kit correct...only the technical aspects of it. If you think it would be fun to build the Tamiya kit with the Verlinden interior rather than scratchbuild/update, then that is teh correct answer for you and I say go for it, have fun!
As for Verlinden, the instructions will be not as good as you might want for a conversion of this type. The pieces should be looked over to make sure you have everything and you know what is what. Sometimes Verlinden's instructions show assemblies that are not included...like the HMG in the Iraqi Command Tank conversion...on the Instructions, but not in the box.