[neallewis]

I'd suggest the response time will certainly be quicker with the Sanwa kit. I never thought there was a difference until I tried one, and bought it and instantly went faster with less errors, which I put down to the more connected feel, and no lag between the stick movement and response at the car.
Although the MT4 isnt a top of the line radio, its certainly a quality bit of kit. I don't/can't use a wheel radio, but i've had a go of both, and the MT4 felt a lot more drivable to me.

I actually started back in the hobby with a DX3C and got rid of it soon enough for a stick radio, as I couldn't do wheel. Are you using the DSM or DSM2 receivers? DSM are notorious for being laggy and getting interference.

Can you try one before you buy?

Expect to pay £50/receiver for second hand ones (or new from hobbyking), and £75/80 for new from UK stockists. You get what you pay for, in my opinion, and Sanwa is the best you can buy.