I have a '00 Kinetic Magnum and I love it. Top speed is about 33mph and it has good acceleration and runs very smoothly once it's warmed up. The Magnum model has a variator which I have heard allows for better acceleration. The drive belt wore out pretty quickly but I bought a new one and my moped runs better than ever.
I've never ridden or seen a TFR so I can't tell you anything about that model. The Magnum has a luggage rack, and has a bigger seat for two as well as passenger foot pegs, and turn signals are standard.
There is some sort of bi-turbo available for the Kinetic which will add at least 5mph to the top speed.
I haven't officially checked my gas mileage figures, but I would say my moped gets around 80-100mpg.
Cosmopolitan motors in Pennsylvania imports the Kinetic. I've called their 800 number and they are very helpful, even though I didn't buy my 'ped directly from them.
For the price, Kinetics are a very good value IMO.