The Sunn Model T and the Fender Model T are completely different animals. The Sunn was one channel, with independent normal and bright inputs, volumes for each, then bass, midrange, treble, presence, and master volume. Power tubes were four 6550s. The Fender Model T has two independent channels, and is powered by four 6L6s.
The quickest way, though, is to look at the inputs. The Sunn has a Normal input, a Bright input, and a Both input connected to both Bright and Normal. Below the inputs are two Out jacks for connecting to another amp. The Fender has one, and only one, input jack.