not really since the HMG is firing at the same kind of target... a maxim MG may kill a cons squad more quickly than a 50 cal may kill an obersoldaten... but that doesnt mean the maxim outdamages the 50 cal...
the nature of scientific testing requires all other variables to be constant or in check except the dependent variable... when there is a greater degree of variability upon said variables you increase your sample size to compensate...
That theory went out with USF mortar.
If one contacted test between USF/Ostheer mortar against conscripts he would probably come to the conclusion that USF is slightly better in game it was proven to be OP.
Incremental accuracy and higher TS probably help the HMG-42/HMG-34 be more accurate vs cons and thus suppress them faster.
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the former suggestion (green cover suppression) makes it problematic for the maxim as its low firing arc means its gonna have to move around alot to survive anyways...
Arc was buffed in previous patches.
Overall, the changes are the following:
* Arc of fire increased from 60 degrees to 90 degrees (other MGs have 90-120 degrees)