False. The two are similar, I guess, but you initially set a flatspin very similarly to a backflip - not a lincoln.
Jesus can we have please inform everybody of what a flatspin is?? I get that they're hard to explain but it isn't hard to explain what they're not.
They're not a backflip japan, not a whack lincoln loop, they're not even a full inversion. Look at how pros do them for the best explanation.