Anecdotically, I've not named Wilkinson products because I don't spontaneously rank them about "lower grade" pickups...
They are not cheaper here when ordered from UK than Bill Lawrence PU's from USA and they are not necessarily similar to other transducers made in Korea, China etc.- a Wilkinson TriSonic is for instance slightly bigger physically than the "same" pickups in an Asian Burns, and exhibits different LRC specs, closer to real vintage Burns single coils...