Harbor freight has stuff made in huge lots. The 62377, would be the older version, and the 93762 would be the replacement version. Your local store will likely only have one or the other. It looks like the 93762 has a different gear case cover, the motor has 2 capacitors, looks like the 62377 only has one. Which would be better? I dunno. Also, the newer one has more curves in the corners of the casting. again, which would be better. for the motor and the casting, I don't think its the looks, but the bearings, support, and how the gears fit, that would determine which is better. That can likely only be done by a side to side comparison, which is not likely something that can be done.
Were they built at the same factory?
Download the manuals, and compare the diagrams.
But before you do all that, call your local stores, and see which they have in stock.