An advantage of Yoonits is then won't have dozens of copycoins, selfbits, mebits (which was one of my early naming suggestions), mybits, ourbits, bitsme, bitsyou, imeminebits, mymyselfbits, facebits, yobits, ubits, uberbits, someofabitches, lol.
Disadvantages are lose the connection to Bitcoin, Younits can be pronounced "Yo", units and nits are less meaningful to normal people than bits.
I suppose this was the reason I preferred Bits so we could capture all the copy coins with the general concept of Bits. Bits is less descriptive and this is a plus and a minus.
Same criticism can be leveled against any portmanteau such as BitSync, so the copies can be DocuSync, ChainSync, Synchain, etc.. That is why I say Syncyo is more brandable (defensible in the market).
Maybe we should entirely get away from the concept of bits? Yoonits is more brandable (defensible) than yoobits.