the SV shape and design features shown in Syd's link do look to be identical to your butter, and other items from the same link indicate that products made in opalescent glass were not uncommon.
I appreciate Syd's comments regarding colour variation - and am well aware that he knows far more than me about pressed material - but I remain to be convinced that Moore's colour range would have included opalescence. If you read Thompson's comments (page 20) about Moore's colours she says......"Most of these bowls are in plain glass but they were made also in an opaque caramel colour." To me this isn't suggesting opalescence - of course, if someone has a piece of Moore in opalescent then I shall eat my hat.
Regret I don't presently have an image/drawing to show of Moore's British Registration 94820 dated 01/03/1888, with which to make a comparison with your butter - but your comments regarding how the gadroons are viewed, may well be correct - thus confirming your butter isn't related to Moore's Registration 94820. But then again factory catalogue drawings are known to differ from the real thing on occasions, although I suspect you're correct in this instance.
Moore's Registrations from this period often share some common feature i.e. the gadroon being the most common, though obviously the whole point of subsequent Registrations was to protect some new design.
If we ignore the wrythen gadroon for the moment, since that element appears to be protected by Registration 58275, then as far as the factory's other related designs are concerned it does appear from Thompson's extract (page 22) of Moore's catalogue, that distinctive elements of potentially matching designs are/were .............
Registration 80013 - shape plus vertical pillars
Registration 94820 - shape plus vertical flattened gadroon ...... and it's potentially this last feature that differs from your butter.
Another feature that potentially mis-matches your piece with Thompson's drawing of the butter from Rd. 94820, is the foot rim.
Your single picture is too high an angle to see any rim, but the appearance of how low your butter sits is suggesting maybe not the sort of foot rim on Moore's suite for Rd. 94820 - but I could be wrong. The foot rim on the VS butter shown in Syd's link appears to be a smaller and simpler rim - does the VS rim match the rim on your butter?
Hope all of this is unnecessary, and that Syd's link has provided the answer, but if people are remain unsure, then I can visit The National Archives in London in the coming week and take some snaps of related Registrations, to hopefully assist.
Small plea, please, in the cause of avoiding possible mis-understandings.............. my opinion is that it may avoid confusion if we all refer to the British Board of Trade Rd. Nos. - i.e. those Nos. used in this thread - as 'Registration Nos.', and not pattern or hashtag Nos.
This is to avoid the obvious confusion with numbers used in factory catalogues, which are referred to, usually, as pattern Nos.
P.S. meant to say - congratulations to Syd for his detective work in finding the matching pattern in the SV link.