Not really a great comparison, your talking the Sanwa uber end model vs something that won't touch it for build or features.

But like has been said, MT4 is a 'very' popular model, for speed and feel it's a much better bit of gear vs the Spektrum, actually a lot of people buy the MT4 vs getting a M12, cause the 4 is compact and light, with just about everything you will ever need.