There are lots of reasons to choose one over the other, reasons "mostly" useless to you. Either camera will work fine. I have an AE-1, in fact, I own one of all Canon's A-series bodies. All are working perfectly. I own only one Olympus, an OM-10, and it is not as reliable as any of my Canons because it was never designed to standards up to the previous OM line. It was made to capture market share. So was the AE-1. The difference is that Canon made a great camera first, that cost a lot, and people liked it and bought it. Olympus started out making superb cameras that few people bought, so they created a lesser (cost and quality) camera in hopes that once people tried Olympus (mainly via the superb Zuiko lenses) they'd invest in more Olympus gear.
Lots of camera makers followed one of those paths. Some worked, some didn't. Some changed course in mid-stream. All in all, what camera will work best for you is the one YOU like best, and that can be from any manufacturer (except Fujica, my opinion, avoid them like the plague) from 1975-1985 or so. Everybody made good stuff then... and those bodies are all OLD now. Some bodies have stood the test of time and some haven't, some will last another 30 years and some are already garbage. Your mileage will vary.
Buy one. If it doesn't work right, repair, return, or get a new one. It's all good.
Lots of camera makers followed one of those paths. Some worked, some didn't. Some changed course in mid-stream. All in all, what camera will work best for you is the one YOU like best, and that can be from any manufacturer (except Fujica, my opinion, avoid them like the plague) from 1975-1985 or so. Everybody made good stuff then... and those bodies are all OLD now. Some bodies have stood the test of time and some haven't, some will last another 30 years and some are already garbage. Your mileage will vary.
Buy one. If it doesn't work right, repair, return, or get a new one. It's all good.