It’s an interesting document, in quite a few other aspects, too.
As far as I know, currently WoS produce Jocks Choice only under M&W brand. I dare to suppose that at some point they had the same snuff placed on the market with different name under their own WoS brand (before 2016), but it’s just a bold guess, for I haven’t tried most of the discontinued ones. Other M&Ws are WoS-own re-labeled products.
The point here is, why bother making two (or three) different snuffs, when you can make one and sell it under two (or three) different brands? This trick just works. As you have noticed, there’s also a Turmeaus line. And yes, those few tried by some snuff video reviewers were found to be very similar to WoS-own snuffs.
Given the variations among batches (see https://snuffhouse.com/discussion/12650/wos-inconsistency#latest), it seems that discussion about M&Ws being same or different is doomed to re-emerge every now and then. I can personally witness fairly dramatic differences among various batches of the same WoS-made snuff. Talking about M&Ws, last batch of Particular had little in common to the snuff I used to love some years ago, when it still was available only at the Covent Garden.
At some time Gold Label and Mature Crumbled were identical. I haven’t had them for a long while, so can’t tell how things are at the present point. However, Older Particular used to be different from the current Best SP (both tobacco base and flavoring-wise).
Now, wondering why 4 different snuffs within one brand have the same product code assigned to them, it might be simply down to tobacco products notifying costs reduction. They might be similar enough from some technical point of view to consider them identical (or this is merely what the manufacturer wants the registrar to believe), despite them actually being day and night different to nose. Again, just a thought, for I have no idea if the notification fee applies to only one product (instead of four) in such case.