I am not sure if UBC Okanagan is easier, but UBC Vancouver med school is EXTREMELY competitive.
I graduated from UBCV (engineering), so I know quite a few people who studied biology or biochem trying to get into med school (since it's post-degree). I only know 1 person that made it, and most of them have insanely high grades.
I don't know much about UBCO, but the place is beautiful. It's a bit far from Vancouver (which is the nearest big city), so it's not nearly as popular. It's less competitive because of that.
Okanagan valley is absolutely gorgeous, though. Weather is very nice, mountains on both sides, and quite a few ponds. People there are very nice, too (based on my couple hours in Penticton).
Kelowna (where UBCO is) is slowly becoming a big city, though.
I'm not sure if the degree from UBCO will be any different from UBCV. Would be awesome if they are the same, since a UBC med degree is very highly regarded in Canada.