Okay, now I remember why it's confusing as hell.
PW4
Forma
They both use the exact same SoC, an i.MX6SLL.
NTX reports the Forma as an mx6sll despite the confusing human-readable bit of cpuinfo entry. That's accurate, IIRC, because earlier devices *were* using the original SoloLite, and were reported as mx6sl by NTX.