Not sure why they'll risk manpower on two completely untested new designs ( for plan ofcourse) ..Could it be
003 at JNCX with EMALS at 80,000 tons and 36 aircraft
and 004 is a CVN-19 with EMALS but 100,000 tons and 48 aircraft
Since they're upgradation strategy has always been like Intel's Tik-Tok.
I.e. testing one new design with new tech while an old design with new tech as a backup. ( in case of destroyers like type 51c etc)