I know it's their big selling point but given that human reaction time is 120ms+, a difference of 8ms isn't going to make much difference. I say sell the radio you don't like or use it on a car to share with friends, and either get a new one or stick to the TQi.

Not sure I'd recommend the Sanwa fh-e models though, since they don't work with any other Sanwa gear. I'd rather get something compatible with the off brand Fh3/fh4 rxes