и там и там в Idle потребление от десятком мкА, т.е. Вам нужен более глубокий режим сна. У 34х из Stop можно выйти только по ресету, а вот у 41х читаем раздел 19.1

When software writes a logic 1 to SUSPEND (OSCICN.5), the internal oscillator is suspended. If the system
clock is derived from the internal oscillator, the input clock to the peripheral or CIP-51 will be stopped until one of the following events occur:
•Port 0 Match Event.
•Port 1 Match Event.
•Comparator 0 enabled and output is logic 0.
•Comparator 1 enabled and output is logic 0.
•smaRTClock Oscillator Fail Event.
•smaRTClock Alarm Event.