Manhattan-Style routing being the use of expressly east-west planes and north-south planes, using a via and changing planes when a signal changes direction.
Comparing to freestyle routing, which lets define as routing signals in any direction on a given layer, would manhattan routing generally result in increased density, signal integrity, and more or less layers?
I know this is somewhat general and highly specific to a given application, but I'm generally interested in why one would decide to route in a manhattan-style -- surely the reasons relate to one or more of the above, and there should be some justification to that end.
One guess of mine is also that two adjacent layers, one E-W and one N-S would be fairly minimal in cross-talk due to the perpendicular nature of the traces, versus two adjacent layers where the layers are routed free-style. Would you agree?