XRAY - Model racing cars

I am wondering which radio to choose for my new Xray T4. I was using futaba back in a day but I had a nasty interference with their radio (it wasn't a 2.4ghz technology, it was back in a day when a crystal was used lol) I was thinking of buying a Sanwa/Airtronics radio for sure. Their products are praised by most people on the forums. I found 2 models : the Sanwa MT-4S and the Sanwa M12. The sanwa M12 is obviously newer and therefore a more expensive model but I was wondering is the difference between the two really worth the extra 100+ dollars? All I want is a radio/receiver combo that is not affected by interference so that I can control my model with confidence. All feedback would be much appreciated .

Boris

I chose the M-12 over the Mt-4 only because I drive left handed. I haven't heard anything negative about the Mt-4 from anyone, some I know have switched to it from the M12. So, in my opinion you can't lose either way you go.

Thanks for the reply! I will go with the mt-4 to save 100 bucks