Mirrored fields are proofs which get that because proof dies are polished up more before striking and struck at a higher pressure.
The whitish looking ones can be anything from the silver uncirculated, to a business strike, to a coin that just didnt age well in the mint cello and got that layer of "foam" over it for lack of a better word.
Get some pictures of one of each youre wondering about and we can tell you whats what which you could use for a reference guide.