Ah - according to Wikipedia:
"Lace Sensors are true single-coil pickups; however, internally they are different from classic single coils. The chief difference is that, like the pickups used on the Fender Jaguar, the coil is surrounded by metal barriers which are designed to reduce electro-magnetic interference such as power line hum. According to the manufacturer, these barriers also help concentrate the magnetic field, allowing weaker magnets to be used, which results in less string pull. Less string pull, in turn, means truer pitch and intonation, and superior sustain."
So it's more a different means of putting together a sc pup... Looks to me like it broadly speaking puts the coil between magnets rather than wrapped around it...
Seems Fender dropped them when they got their own Noiseless series developed. I remember a lot of Neanderthals howling that the Laces weren't "proper" pickups because they had no polepieces, but lace sis develop a "Holy Grail" model with fake polepieces on it for that market.