The 'Gen 4.5' Supers ..... with actual range, speed, agility, redundancy and reliability.
Range is dependent on external tanks, which the F-35 can also carry (I realize this reduces low observability) the Super Hornet is slow and draggy when carrying external ordnance, agility does not equal maneuverability but the weight to wing area is very similar between the two when similarly configured, if you're dead set on two engines well OK, time will tell if the F-35 turns out to be reliable.