that's a very interesting find and a good comparison............

the obvious differences i.e. the opaque glass as opposed to semi-transparent - plus the gilded text within the cartouche - may well indicate early C19/Regency.
Generally the difference between early and later C19 enamelled glass is this difference between the body colours - the later Victorians turning out reams of green and brown transparent pieces with much plain white decoration - the Mary Gregory pieces for example - as opposed to the earlier opaque bodies.
A lot of fairly cheap C19 pieces though did often have poor quality very thin gilding on rims etc.
The linked shape is close although not exact.
We've no idea from the link what the original provenance of the 'Glass Circle' example was - you might email Fieldings and see if you can find out more........... is it me, or does the hammer price appear low for such an item??