You're kind of comparing apples and orange. For example, the Rizzini a very high dollar gun and a Stoeger is an economy gun. With that being said, a friend of mine recently bought a Stoeger o/u and is very pleased with it. If your on a budget you might go with the Stoeger. I'm not really familiar with the other two guns on the list.
I think I have finally talked myself into getting a Mossberg Silver Reserve. I held a Spartan today and it felt way too cheap. Twisted in my hands. Eth. The Mossberg felt very good.