Question about the 582 stator

I actually have a 670 and it has been getting hard to start when it is hot. I know the problem usually is the ohms drop below a certain limit which makes it hard to produce spark at low rpm's. What I do not understand is- when the stator is cold the ohms drop which should make it hard to start and when it is hot the ohms go up back to the serviceable range. So shouldn't it be harder to start when it is cold when the ohms drop on a stator that is already low to start with? BTW I replace w/ a new one that read 316 at 75 deg and she pops right over. The old one was 267 and 240 if I remember right. They were both the newer style.