Yours has the chunky, squarish body and shorter face of the Midas end of the spectrum, but chances are there are genes from both RD and Midas in your feral population, like the others said.
I have siblings of the same Midas parents from a breeder and some of them look like the more elongate RD types and some the chunkier, blockhead Midas. So there can be variation even in the same litter, I guess.
That is absolutely awesome that you can catch these in your backyard. Well, I guess it's unfortunate that they got into the local ecosystems, but now you can help by removing them. I am amazed at how fat and healthy he looks, must be lots o' good bugs around there.