What is the difference from utahloids and vocaloids?

Vocaloid is recorded program voiced by Singers and Voice actors (mostly). You have to buy VOCALOIDs to make a VOCALOID sing . There is no such thing called utauloids just UTAU. UTAU is a singing program same as VOCALOID, Cantor, etc. UTAU is a free voicebank that you can download and it's sang by a coumputer.