True if you already nailed the system you brewed on previously and make great beer then you probably won't see a big difference. However, temps will be held perfectly and effortlessly, ramping to the next temp in a step mash is very easy and there is no temp overshoot. This makes repeatability on making the same recipe over again and come out the same way a big benefit, so your beer will actually get better. Also no more excessive hot heat wash from the vessels if you use propane (to heat up the area), and electric is a lot quieter. I think it is much more convenient to use electric and it is a pleasure to brew on an electric rig. You won't look back I know I don't!
John