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Grant, If I read the break down correctly, then those belts are 965mm (5 rib) and 990mm (4 rib) respectively.
While the ones shown are 1032 mm (4 rib ~ 42mm or approx. .81 inch longer) and 996mm (5 rib ~ 1mm or .039 inch longer). which is what I am seeing available around here in variance.
I don't want to order a belt that ends up being to loose or right on the edge.
Your existing belts might well still have legible printing on them with size and specs.
I'm not aware of any specific brand being particularly good or bad. Gates, Dayco, and Goodyear are quite common and I've not found any of them to be poor quality.