I meant specifically the round horizontal design with red lights on either side of the fixture. Most lights only have a red light at the top or on the left, most of Quebec has them on each end.
And I think Nova Scotia uses shapes, which is also very weird.
Another thing I find odd is traffic lights that don't have a 'frill'. Your vertical examples are 'frill-less'; Thunder Bay's lights have 'frills':
The frill is the flat metal thing that goes around the light to make it more visible. Ontario's traffic lights are required to be yellow and the red lights have to be 25% larger than the others, and I think there is also a law against having them vertical because I can't think of any Ontario cities where they're vertical. The yellow thing actually works; you can see them from a distance before you see the actual lights.
We've been switching to centre-mounted vertical lights because the hanging ones kept getting bent by the wind, and lights are kind of useless when they're facing the ground or the sky, instead of the traffic.