SMA and other string inverter manufacturers used to say all strings in parallel had to be same orientation.
Later they tried multiple orientations and reported power produced was 2% less than if the two strings each had its own MPPT.
So that should be in practice. You waste 2% of PV panel capability, but get more out of the inverter due to higher PV wattage throughout the day.
With 90 degrees, trig or Pythagorean theorem, says diagonal of triangle is 0.71 times sum of two sides. Closer to same orientation, area presented to sun is closer to sum of the two panels. Not taken into consideration is that off-angle more of the light is reflected not absorbed. So it is a first-order calculation.
Figure out presented area for 38 degrees and you'll see how much over-paneled it would be.
These days, Enphase is advertising its inverters based on how big a PV panel you could connect. When available wattage exceeds inverter's output rating, power is clipped. Some amount of over-paneling is useful. If you already have a 300W STC panel (maybe 270W PTC?) on a 215W inverter, in that case I'd suggest more inverters for more panels. Unless panels have no tilt to the South and sun doesn't get that far North, so presented angle already reduces output so no clipping.
I prefer string inverters - more series/parallel configurations to fully load it. But now that RSD per panel is required, not so much savings.