Hi there,
Where I am in Brasil, octans and the SCPole is kind of low. Sometimes, when is kind of cloudy or haze, Sharpcap may have some trouble find stars. Polemaster seems to me less demanding in this aspect. So, for sometime I have been doing like that: first Polemaster, followed by Sharpcap. It is a kind of routine to me. Do not ask why...
Regards, Fernando