AEPs may not suffer from the same issues that GBB pistols do due temperature variation in the winter. However due to the small size of the battery used in AEPs Id like to hazard a guess and say that you will suffer from quicker battery drain in the winter season. Also due to the fact that an AEP mechbox is so small it may suffer and strain in the cold as well.
There are pros and cons to both, Ive run both in the cold and both functioned well enough when I needed them. Just keep your pistol mags really close to your body, and a spare AEP battery along with them.
"Its only a little bit on fire"