More glorious undisclosed Speyside 1973 coming up! The first one is more of a reference sample, as it is a shared cask and we’ve already reviewed the Archives counterpart . The other two are slightly more recent, bottled by Whisky-Fässle and Mancarella who already had a sister cask before .
In my opinion the downside of this kind of comparison is the tendency to exaggerate differences, simply because you’re willing to translate your preferences into numbers. In reality though, these casks are all very closely together, closer than the actual score maj indicate.
Speyside Region 43 yo 1973... 
Tullibardine 24 yo 1993 (52,5%, Sansibar ‘Clans label’ 2017, 272 btl.)
Deanston 12 yo (46,3%, OB...
Bunnahabhain 35 yo (40,2%, That Boutique-y Whisky Company 2017, Batch #4, 50cl, 302 btl.)
Port Askaig 8 yo (45,8%, Elixir Distillers +/- 2017) 

‘Isle Solera’ 16 yo (58,1%, Woodwinters ‘The Four’ 2016, sherry butt, 50cl, 700 btl.)
Glenrothes 2000 (58,7%, OB 2017, sherry butt #2364, UK exclusive Batch #1, 575 btl.)
Glen Keith 21 yo 1995 (48,6%, Cave...
With
Inchmurrin 18 yo (46%, OB +/- 2017) 

Kilchoman 10 yo 2007 (58,5%, OB for The Whisky Exchange 2017, sherry butt #401, 599 btl.) 
Convalmore 1975 (46%, Gordon & MacPhail Rare Old 2015, refill sherry hogsheads, ref. #R0/15/06, 299 btl.)