The new thing about the carrier ops of the USN in 44/45 was their long duration without visiting a port, although keeping a substantial sortie rate. That was possible due to escort carriers having spare aircraft on board. ANother factor was probably the more reasonable weather of the Pacific (compared to North Atlantic).

I don’t think the USN had such a high attrition in crews as they gave special attention to that. The Japanese however suffered heavy losses each time they went into combat, even when winning the engagement. After normally two to four sorties against defended targets most aircraft and crews were expended. Compare with operations at the Salomonen Islands. Possibly also due to Samurai mentality of the Japanese airmen.