Have you removed the bridge ferrules on the back of the body and sanded there? You should probably post a couple of decent resolution photos of the front and back so it's totally clear what you have done.
I have only tried a 102H in a shop so wasn't able to compare with the 112H. All I know is that I like the sound of the mb 12 combos and cabs which are a narrower format than the 210. If I want louder I just add another 12 cab. Common sense tells me that a cmd102h combo with a 102 front ported extension cab would be louder still.
I don't have any experience with either of those but I have owned plenty of amplification over the last 35 years. The markbass combos all contain the LM2 or 3 head which I think is key to their ability to cut through the mix. It is a solid state analogue (not class D digital) amplifier which has quite a warm delivery for its type. In my experience it makes almost any cabinet sound good. The great thing about the combos is that you can pick them up on BC for a few pounds more than a used LM2/3. I don't think that there are too many light weight combos out there with such highly regarded power sections for approximately £500.