I have 3 budgie's,2 raised by hand in a cage with my 2 finches and they all seem to get along fine
My one finch is a wild one that was raised from a baby who fell out of his nest and will be 2 yrs old this summer and the other finch is a red cheek finch which I bought at a pet store
I had the finches speparted in thier own cage but Mouse ( the wild little one) was not happy so I put both back and they all seem fine Chemocat