I had to look it up, because I thought Olay was owned by L'oreal. It is not, it's under the Proctor and Gamble group of brands.
Now to compare, both companies have a lot of hit and miss products. You really need to read the labels to make sure you're getting good active ingredients. but jar packaging tends to ruin sensitive creams too fast!
both I would say are usually a bit overpriced in Canada because you tend not to get enough active ingredients and mostly filler and fragrance. I still look them up on Paula's choice to see the reviews there.