Yeah - firing US standard 75mm with a slightly modified 3" AA gun cartridge - apparently the cartridge was just necked down from 76.2mm (ie 3") to 75mm for the projectiles and the breech was modified (for the necking down I guess).
The 77mm HV in the Comet was then this gun firing 17 pdr projectiles, which were 76.2mm of course. So the cartridge didn’t need necking down any more and it used standard 3" AA gun breech mechanism
M4A2E8: Out of the 76mm Sherman, the UK could get its the best and the worst. Best as in it’ll fit nicely in the 5.3 line-up(which, if you have premiums and events, is one of the best line-ups), worse as in it’s both foreign operated(unlike the A1 76s they could get) and C&P(unlike others), a setup hated by many UK players. It also didn’t see combat and just stayed at home, unlike its brother.
M4A3E8: This one has my favour, but wouldn’t have a line-up. It saw combat and was modified, even if most are minor in WT terms, bar the 200+ shells it could bring. Making it a bit better pick in most people’s eyes, but still not great.
Note: Yes, those are the names Canada called them by, no, I don’t know why.
Potent 1 - Typical Gaijin Logic
Because M4A1 76(W) isn’t Sherman IIA.
Just how F-86A-5 [8.0/US] isn’t CL-13 Mk.4[8.3/ITA]
Potent 2 - Some silly extra ammunition.
Because we got the M93 shot (APCR) somehow, which we didn’t ask.
Just how our Sherman II maintains a higher BR(3.7) than the M4A1(3.3) because of the T45 APCR shot.
I don’t know. I have reports over 8 years now that were “FWD as a suggestion” and still not implemented. I’ll report back after 10 years and let you know. :D