The menus aren't that different. There is a different pork preparation between lunch and dinner and lunch has an extra sandwich added to the menu.
The fish could be the same, it depends on availability (aka catch of the day/fresh catch).
I assume you want the pork plated meal, that's the only real difference I can discern. And I would say, all you can do is ask but have second choice in mind.
No one here can tell you if you will be able to get it on any particular day.