If the noise is caused by vibration against floor and sides of cupboard you could try sticking foam tape to side to reduce noise and dense foam to the feet [an old mouse mat chopped up is ok for this]
Many webites include noise levels in decibels in the spec. If not just google the model number along with "noise db" and you should get a match.
ZRG614SW shows at 38 db.
Higher number is louder. Whether that takes into account the clunk and not just the hum, I don't know though but you can at least compare difference models.