A fair while ago Batemans dropped the ABV of Rosey Nosey. I think is was above 5% down to 4.7%. At some point the 4.7% version was added (maybe by me), so there were two versions. Higher abv and lower abv. Since then the old version has been changed to reflect the new abv so we have two version of the beer with slightly different names but both at 4.7% abv. The cask is still shown separately.
It seems a bit pointless now to have these as separate beers.