I fabricate and fit Corian quite a bit. As a material, it is quite flexible in its 12mm standard thickness. Using it as a surface for your Router table will possibly be durable enough, but you will need to make it rigid especially when you hang a Router from it otherwise it will probably sag....
Cutting & machining it is pretty straightforward with TC blades and router cutters.
I cant speak for Samsung Staron, but the sheet thickness of Corian can vary a bit, even within the same sheet.
It's worth bearing in mind though if you decide to try any Solid Surface for this particular application.