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Literally - four 1v1s next to each other. You can still help your teammates, but overall the gameplay is more dependent on one player taking care of a certain part of the map.
Both of these designs offer a in my opinion good ratio of the values and a far better (less static / chokepoint) gameplay. I'd love to see more 4v4 maps in those looks rather than ones like Angermünde.
Given that Angermunde is designed to be a narrow map with no flanking and where both sides have reasonably secure fuel point it suceeds at it's task
It's a head on clash where tanks have problems (as they should in a city) and where you really need to work to get a flank.
I don't mind having another map that is 4 1v1s side by side because I like variety, but I'd be concerned if that gets presented as a platonic ideal.
Really almost of the maps for 4v4 are balanced, or at least the imbalances are not relevent compared to:
Differential player skill
The vagaries of the matching system
Teams being put up against Randoms
That people are afk, drop and rage quit
The only situation that I think is unbalanced is Rostov North as Germans.
Everything else is pretty even, certainly considering everything else that skews balance