Basically the same activation method and effect. A pressure activated firing pistol, requiring around 200 lbs of pressure, 'fired' by pressure on the central 'plug' in the dome, or by a slightly larger diameter pressure plate. The British mine used that cross-shaped ring, or 'spider, as the pressure activation, which pressed on a sear, releasing a pin which activated a plunger-type firing pistol. This meant the mine could be fired by pressure anywhere around the upper surface of the mine, whereas the 'Teller' normally required that pressure to be in the center, so it could possibly be run over at the edge, and not detonate.
I think the German 'Teller' (plate) mine had around 10 or 12bs of HE, whereas the British Mk.V contained around 8 lbs, and was later replaced by the more effective and reliable Mk. VII AT mine.
All of these mines were designed to blow the track off a tank.