[Lera]

Not all vinegar is apple cider (from apples) or white (from grain)
ὄξος oxos ox'-os From G3691; vinegar, that is, sour wine: - vinegar.

if you take a bottle/cask/skin of wine and remove the covering ( let the air get to it ) it turns sour , it turns to vinegar. Wine is made with anerobic bacteria , if you give them air they die and are replaced with aerobic which turns it to vinegar . Sour grape wine and grape vinegar are the same thing .
Oh and as for the scripture you quoted ... it's all about a an ancient Jewish wedding custom ... he's paid the price (ransom), he's gone home to prepare the place , he not drinking again until the feast but first he needs to come back for his bride .

Interesting tid bit here ... a wedding feast last 7 days
Every time you hear the Gospel he is inviting YOU to a wedding .

[Mad Dawg]

(Quibble: Actually, it is yeast that ferments grape juice into wine. It does so anaerobically.)