The deeper pan sump helps to :
Keep the oil pump pickup better submerged during hard acceleration or lateral movement. (pan still needs to have slosh baffles and oil pump must have an extended pickup tube - Examples :see MILODON ,MOROSO,CANTON etc.)
Keep the sump oil volume further away from the spinning crankshaft (helps to reduce windage and oil aeration) Still a crank scraper and properly designed windage tray should be used in combination with the pan.
The pan should have a side kick out that will work in conjunction with the scraper set up to return oil efficiently back to the pan (see Ishihara & Johnson- http://www.crank-scrapers.com/
The proper pan /scraper/windage tray setup works especially well at higher rpm ranges to reduce parasitic horsepower loss , oil aeration/starvation & imbalance on the rotating assembly caused by the weight of excess oil clinging to rotating assembly components and not returning to the pan.
Do your homework and choose wisely.