Having a consistent oil flow at each point in the circuit is the most important thing, due to bearing cooling requirements. In that regard, feeding the crank at each main journal should give as good a pressure distribution as an end feed with its long, convoluted passages and inherent flow losses.

The only benefit to reducing oil system pressure is a small reduction in the oil pressure pump drive losses. These losses can be of concern with low power production engines that tend to mostly operate at very limited power outputs, but are not an issue with high power race engines that operate mostly at WOT. The additional fraction of a horsepower that might be gained is relatively insignificant.