How to identify peach tree varieties?

I bought a fruit cocktail tree few years back and it has 5 varieties of fruit grafted to one tree. I kind of want to know which one is which. How can I go about identifying each?

One is done because they put a "Bruce plum" onto a peach tree so that one I know which it is. But it also has "Ruston red, dixland,belle of GA, and redskin" peach varieties. Which are the ones I'd like to identify for pruning reasons. Don't wanna loose a variety because of a wrong cut. Also I would like to take some more cuttings to create more trees. I have already got 2 Bruce plums tissue cultured then potted and now planted in the ground for a year so would like to try some of the other peach varieties off this grafted tree.

Right now I have baby fruit and they do look different so I think this might be the best time to start figuring this out... any advise is welcome and pictures are a big help as well so let me know if I need to post some...

Thanks,
Mike

it’s gonna be tough to distinguish three of them. belle of georgia is supposed to be a white-fleshed peach. the others are all yellow-fleshed and freestone. redskin may bloom for longer time? if you can figure out where the graft unions are, try to take as many notes about differences as you can. shade of color of flowers, timing and length of time of bloom, size of fruit, etc. that might help parse it.

or you can just decide whether you have any actual favorites, and propagate them, regardless of what their name is supposed to be.

Yeah I here you there. I guess "really" it doesn't matter the name haha I could just label them 1-4 and say dang that #2 peach is the bomb lol. But I believe i know where all the graft unions are so I have an idea of which branches are for what graft. I just wasn't sure if it was an easy thing to identify different varieties of peaches. One of the baby peaches has a red-like smooth skin and I was wondering  if that wasn't the redskin type. The others are more of the fuzzy skin type which will be harder to identify. Lol but I guess it probably isn't that easy.