If it matters for you, the Mossberg 20ga autos are imported. The 12ga autos are made in USA. The 12ga guns are probably one of the best values in auto loaders and are seriously overlooked. They are very soft shooters, and the stock can be shortened.
For pump guns, I can't help you much. I do prefer the browning/Mossberg saftey location. But that's what I'm used to with double guns. I have a BPS, Ithaca, and Winchester model 12. They don't get shot very much. Sometimes the Ithaca comes out to play.
Only real way to tell which is best is settle on the configuration of each you like and shoot them both. If there is negligible difference in results, buy the cheaper/easier one.