Comet's AOE was changed too, but it seems like the stat was updated on Serealia's site (from 6.7 on coh2db to 11.3 on Serealia).
I too trust that Cruzz figured out at least a decently accurate calculation behind these scores. They are generally in line with my own experience and they seem consistent between most weapons.
The T-34/85's is 7.7 so significantly lower in total despite having a slightly higher OHK radius.
And obviously the Comet has significantly better AI than the Panther, which was the original comparison I think.
the panther has a total machinegun DPS of 16.517 and around 11.65 for the comet at range 30... as you can see the total DPS of the pintle+coax is comparable to the main cannon...
Comparing MG DPS to AOE is rather pointless, because the MG DPS is heavily affected by cover (-50% accuracy) and target size. AOE effectively ignores these (ignoring the 2-6% chance for a direct accuracy hit) but instead is heavily affected by RNG scatter rolls. Both weapons have their own ups and downs in regards to DPS/DPM, but the mechanics behind them lie so far apart that you can't really compare them.