I've been keeping track record for each blade brand for the total number of shaves from close comb to open comb razor during my shaves, and I do a 3 pass shave WTG, XTG & ATG because YMMV for each blade.
DE Blades (#? of max. total shaves per blade) (*** means I'm starting my next shave with a fresh blade):-
Astra Superior Platinum = (Fatip #?***), (Merkur 25C #?), (Phoenix Double OC #?), (Phoenix Symmetry OC #?), (RazoRock Old Type OC #?)
Feather Hi-Stainless = (Fatip #2), (Merkur 25C #?), (Phoenix Double OC #?), (Phoenix Symmetry OC #?), (RazoRock Old Type OC #3)
Gillette Silver Blue = (Fatip #6), (Merkur 25C #?), (Phoenix Double OC #?), (Phoenix Symmetry OC #?), (R41 v2013 #4), (RazoRock Mission #4), (RazoRock Old Type OC #5)
Ladas Super Stainless = (Fatip #3), (Merkur 25C #3), (Phoenix Double OC #?), (Phoenix Symmetry OC #?), (RazoRock Old Type OC #3)
Personna Lab Blue = (Fatip #?), (Merkur 25C #?), (Phoenix Double OC #?), (Phoenix Symmetry OC #?), (R41 v2013 #3), (DE89 & R89 #4), (RazoRock Mission #4), (RazoRock Old Type OC #?)
Personna Platinum = (Fatip #2), (Merkur 25C #?), (Phoenix Double OC #?), (Phoenix Symmetry OC #?), (RazoRock Old Type OC #2)
Perma-Sharp Super = (Fatip #?), (Merkur 25C #?), (Phoenix Double OC #?), (Phoenix Symmetry OC #?), (R41 v2013 #4), (DE89 & R89 #5), (RazoRock Mission #5), (RazoRock Old Type OC #?)
Polsilver Super Iridium = (Fatip #5), (Merkur 25C #?), (Phoenix Double OC #?), (Phoenix Symmetry OC #?), (R41 v2013 #4), (DE89 & R89 #4), (RazoRock Mission #5), (RazoRock Old Type OC #4)
Vintage Polsilver Stainless = (Fatip #6), (Merkur 25C #?), (Phoenix Double OC #?), (Phoenix Symmetry OC #?), (R41 v2013 #4), (RazoRock Old Type OC #6)
Voskhod = (Fatip #4), (Merkur 25C #?), (R41 v2013 #3), (DE89 & R89 #4), (Phoenix Double OC #?), (Phoenix Symmetry OC #?), (RazoRock Mission #4), (RazoRock Old Type OC #3)
German Wilkinson Sword = (Fatip #3), (Merkur 25C #?), (Phoenix Double OC #?), (Phoenix Symmetry OC #?), (RazoRock Old Type OC #3)