I think both your Polish are males, but I'm not positive. Polish aren't one of the breeds I'm really familiar with. they're amazingly adorable, though!
The birds in question are the fluffy grey ones? I'm thinking they're both pullets, but I'm not sure what they are. The white/pink skin and...
If you do decide to butcher them, feel free to visit our Meat Bird section. You're correct in that folks on this part of the boards aren't always good with discussing butchering or eating our birds, but the Meat Bird section is just for that purpose. Lots of good ideas and support
If you think they're both hens, why not try selling them first? I'm not one for passing on behavioral issues, but in this case I think it wouldn't be a continuing thing. Give full disclosure. If the birds are younger, and go to a home of older, non crested birds, I'm thinking their behavior...