Single or Dual Pattern Cam

Engine Masters just did a comparison of split pattern and single pattern cams using manifolds and headers on 372 SBC with 10.5 to 1 compression. The split pattern made more power in every configuration.
I thought it made a hair more torque in the lower rpm range.
Way back when………
I guess that’s why a lot of guys used 1.5 I & 1.6 E on there rides!