If I was using an ATtiny85 using the internal oscillator at 8Mhz divided down to 1 Mhz via the prescaler, which option would I use in the IDE:
ATtiny85 @ 8Mhz
or
ATtiny85 @ 1Mhz
Is there any difference in power usage, speed of processing, or anything else material, between running at 8Mhz divided down to 1 Mhz and running at 1Mhz with no prescaler?