Gas turbines use Jet a. Which is #1 fuel oil only higher refining.
A nuke aircraft carrier travels 30 years continuous use without a refill.
The benefits of a nuclear carrier are dubious given the much greater expense involved. You don’t save much on logistics because you still need fleet replenishment ships to replenish aircraft fuel and refuel the escorts.
In any case, don’t see what the point of willy waving is about. We all know that nothing is as powerful as a fully fledged American $15 billion nuclear supercarrier but the $3 billion QEC carriers are still a more formidable warship than that which any other navy outside the US can boast.
They are the only other carrier outside the US that wields a 5th generation combat aircraft and should be a formidable asset to the NATO alliance, regardless how it is propelled.