Doesn't this vary for different cruising speed targets? I thought jets & ducted fans were more efficient above 400 kts or so, while (non ducted) propellers were

Doesn't this vary for different cruising speed targets? I thought jets & ducted fans were more efficient above 400 kts or so, while (non ducted) propellers were more efficient below maybe 300 kts. But I'm mostly thinking in terms of turboprop vs. turbofan designs - not 100% sure if it applies the same way for electric types, although I assume it probably would.