All we can do is guess based on sometimes very sketchy information. I'm sure someone somewhere knows the exact values but there are RL variables that make things like this not so much a mathematical exercise of 1+1=2...more like 1+1 = (maybe). The best we can hope for is "close enough" and in that, I think we are. The only way to know for certain, for example, the front armour values( and even that is uncertain ) would be if a known weapon with known ( and verified )penetration values knocked out at least 3 from the front and it was reported but I just don't see that happening.
But... what I am curious about and it's not OPSEC......how close am I on the colour of the Merk 4's ?