What's the difference between the S4•R and the T4•R?

The T4•R is our Freeview recorder; the S4•R is our Freesat recorder. They share the same Manhattan interface and most of the same features, including pause, rewind and series link. The main differences: the T4•R uses a rooftop aerial, the S4•R uses a satellite dish; the S4•R records up to four channels at once (the T4•R does two); and Freesat carries more than 35 HD channels, where Freeview has nine.