Why has the voice changed?
Probably they improved the recordings.
Isn't it "Kue ini ada manis" ?
No. If the predicate is an adjective, you don't need "ada" or "adalah".
Sorry for the probably dumb question, but when is it "itu" and when is it "ini"? Are they even the same thing at all in English?
That = itu
This = ini
Kue ini rasanya manis.