Originally posted by Willfly
It kinda does make since to perk the Sherman VC Firefly (It's not designated a M4 according to British Designations (Which is where the M4A4 Medium tank were sent from the USA were converted))
The Tiger I may be perked not only because of a Superior 88mm KampfwagenKanone(KwK) 36 L/56 but because of it's low production rate.
The Tiger I had a production rate of approximately 1400 tanks, Compared to 7394 tanks produced of the PzKpfW IV Ausf H
The Sherman with the 17Pdr. (All Firefly variants) had about 2346 tanks made, Giving it a legitimate reason to be perked. Perking tanks merely because of superior armament does not make sense. It is the number of these tanks produced and distributed into military units that should matter.
If things were perked according to numbers made -
Ta-152 (which used to be)
The uber (total of around 25 made) 110 version
3 cannon Lala
Seafire IIc we have (if this version ever existed, and there's doubts)
Looking at the bright side the XIV would be unperked.
So I guess it's not on numbers made.
But of course the Sherman Vc is British, so it's as good a reason as any to perk it.