Someone on Facebook had recently put up a post showing the pages of a Argos 92/93 spring edition showing off the gaming pages. On the master system games section it shows the sonic and batman variation insert but also has a Taz MS2 variation. Is this already known information as I was only aware of the sonic, Batman and the yet to be discovered home alone variation.
A friend of mine used to work in packaging and would generate barcodes for their products, he recently tried to read the SMSII Sonic 2 barcode but it would not scan meaning that these would have been meant for display / advertising purposes only. It makes sense that more SMSII Sonic 2's show up as this game would have been heavily promoted in comparison to Tazmania, Home Alone and Batman Returns.
It's definitely a mock up screenshot, maybe it was too tricky to take an actual picture of the game running. Not only does it not say 'Rings' in the actual game, there is also no timer in this picture.