If your point was to clear up confusion over when the VSTIII and V15III cartridges were made, fine and dandy. But your use of the word "infamously" in reference to Shure's customer help answer is a very harsh charge to make (synonyms include disgraceful, wicked, shocking, vile, base, heinous, villainous). The customer asking the question thought the two were contemporaneous; if he was familiar with the V15III, Shure's answer made it clear that they weren't made at the same time, but without dwelling on or highlighting the customer's misconception--to me that's not infamy, but laudable courtesy.
When asked to compare the VSTIII with the V15 line, Shure's answer makes clear that it was not up to type V, or even type IV, standards, but that it was similar in performance to the older type III. Is that a shocking or heinous comparison? When asked to compare the VSTIII with the M97xE, Shure's answer is that the newer cartridge is an upgrade. My ears tell me they're right, but so often I see the charge leveled, as you and dlaloum have done, that their answer is not honest but a lie told in an attempt to sell current product. Again, it just seems a very harsh characterization. Surely one person can disagree with another on the merits of a product, and give reasons for that disagreement, without resorting to calling the other a liar.
The only fly in the ointment here, is that the M97HE was the step below the V15III in the Shure range when both were available alongside each other. (and a substantial step down)
When Shure re-vamped the M97HE as the M97xE the cantilever appears to have become heavier (higher effective mass - worse) the needle cruder (went from Hypereliptical... and the Shure HE's were very nice! - to a very nice eliptical - but still a step down) - and production shifted to mexico and has demonstrably had and continues to have quality issues.
The underlying design is in no way different to the M97HE - the resistance/impedance spec of the cartridge is identical, and the inductance specification differs by less than 10% (10% being approximately the manufacturing tolerances on Mass produced MM's) -with 650mH vs 700mH.
If Shure have in some way "upgraded" the M97HE to create the M97xE and in the process eclipse the poor underperforming V15III.... they made a dramatic marketing mess up of it and forgot to tell anyone about it!
Majority concensus is that the M97HE was superior to the current M97xE - and within the Shure range at the time, it was substantially inferior to the V15III and V15IV - in reality the M97HE was supposed to be a budget V15IV - and the M95 was supposed to be the equivalent budget V15III.
What you hear and how you react to that are highly subjective, and hugely prone to psycho-acoustic effects - the only way to compare is to do double blind level matched testing - and when doing so you need each cartridge to be set up and loaded optimally. (ie: differently for each potentially...) - I have experienced variable results with comparisons and will simply say that it is very difficult to compare two cartridge fairly... (my own experiments with level matched listening have shown that getting two very different cartridges level matched to within 0.1db eliminates a huge percentage of the difference between them....)
It is my opinion as a listener, that the M97xE (with SAS stylus) is inferior to the V15VMR (with SAS stylus)... and it is also my belief that the reason for this is related to the laminated core structure. This core structure is also present on the V15III and V15IV (albeit in higher inductance form) - and absent from the V15VxMR, M97HE, and M97xE. (worthy of note is the fact that I make this comparison with the identical stylus type in its respective forms for the two cartridges - as near as you can get to identical stylus given the differing shank format)
My severe skepticism about Shure's response to a customer that the M97xE is an "upgrade" from the VST-III or V15III, is purely due to a complete cognitive dissonance between all the Shure published material dating back to the 60's, and the verbal comment of the customer service agent.
In fact based on the technical material published by Shure (including the white papers on their website) - the customer service agent is wrong.
But then geeks who read all that technical stuff are in the minority.... so there is a high likelihood that the service agent was ignorant - after all their main market today is DJ oriented - and they are unlikely to be hiring people who know the history of the Shure cartridge line to man the phones!
Hey I could be wrong.... maybe its an upgrade - but there has been nothing published by Shure to intimate that this would be the case. - And only the occasional words by a Shure rep....
The Shure documentation do mention that the current nearest equivalent in the Shure range is the M97xE .... which is far from saying that it is an upgrade.
bye for now
David