POWER CHAIR v MOBILITY SCOOTER?

Hi new here, in Scotland, just joined. Currently use a mobility scooter, it's fast and solid and great on the hilly streets here - but I'm just not liking it at all. Very big and cumbersome and I feel like I'm driving a tank. I was looking at power chairs and think they''d be a lot easier to manoeuvre on a busy street full of dog walkers and baby buggies etc. Only worry I have is would it cope with steep hills and bad pavements? And can you take them out in bad weather, are the electrics ok in the wet?