if I buy an ultrasonic cleaner for my records will I be able to hear the difference?

At Degritter site you can hear the comparison before cleaned and cleaned record.

Although the recording is not particularly good you can still hear that on the non cleaned one you have focused presentation, with piano, vocal, accordion and violins have their own space in the venue.
On the cleaned recording nothing is anymore from one piece. Instruments are out of focus, transferred to left or right, vocal became big and hollow for the same reason. Everything is in your face. It seems cleaner, but you loose the event hologram. Something that happens when you go from Decca to London.
 If you have very high resolution system everything is more obvious and you can clearly hear what US cleaning does to the records.

A.

Pbn, first listen to the two recordings and if you do not hear it that way, good for you.

Rrm, in my view ruined. The cleaned piece sounds to me completely flat and soulless.