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What you have is what is known as the OMC Universal Magneto, and yes it actually almost universal for many years since it’s introduction. That is why all your motors use the same replacement coils. But then we get to all the different part numbers. Yep, it is true, the coil went through a number of evolutionary changes through the years. Some of the changes brought a change in part numbers, some didn’t. Most of the changes involved different plastics used for the coverings. The latest changes involve a shell-type covering, as well as a different shape where the spark wire enters. To sum it up, all the newer numbers are compatible with previous models.
It would be hard for me to list a “best”. Easier would be to list a “worst” which would be the Sierra coils that don’t fit. As for where they are made, there are so many sellers, who knows where they are made? Probably one of the best aftermarket ones were made in Germany, but they are no longer made. As for the OEM coils, I don’t actually know where they are made now. Wherever, they might not be made much longer, with the last demise of OMC/BRP.
A wise sage said “You pays your money and you takes your chances”. Amen.