mrlc - I don't know either of those cameras, but if you're taking images for use in PhotoScan three aspects I would suggest investigating are (i) triggering the camera automatically from your UAV's flight controller or some other way that you can record the information to accurately geo-tag each image, (ii) can you lock the camera on a fixed white balance, and (iii) can you lock the camera focus at infinity to stop auto-focus hunting.
Dave