Well the carrera and boardman have a torque measurement system, I think thats kind of a nicer feeling instead of the sudden onslaught of cadence ones.Welcome manxcat
There is no answer to that. "Which is best" depends entirely on what features and capabilities you need and want, what purpose you're going to use the ebike for, and what terrain you're going to cover. None are dogs: There'll be very happy owners of all of them.