Well, while it WILL speed things up, in the end, it really needs to make you happy. If it's going to bug you every time that you look at them and then the ones you have here, about the difference, then I'd say take a little longer with them and do this same quality. Just think how awesome 120 of those little Skinkers would look on a table top!
I have a ton of these littles to do as well. I just may try your quality method and get them done right as well!
If you're looking for a colored Primer, I'd definitely go Army Painter. AP's primer has a smoother coating (in my experience) than GW's primers. It also has a better spray that covers the model much better.
And as for the difference between your regular Skinkers and the Skinkaquins, I like that they aren't exactly the same! I view it as a designation of rank. Even in the military, not ALL of the soldiers wear the exact same uniforms! Lol!