> My one concern is that their CPU options top out at 4 performance cores; the i7-1370P I have right now has 6.

I was looking at benchmark comparisons between my i5-1240P which has 4 performance cores and 8 efficiency cores, and the Ultra 5 325 which has 4 performance cores and 4 low-cache ultra low power efficiency cores.

The 325 is still faster multicore than the 1240P.