I think Gojo just said that he had more potential than him, not that he had more cursed energy. I guess that could be interpreted in that way...
Nope. Its stated in the work that Yuta has more CE than Gojo and that Sukuna with Full Power has double the amount of CE that Yuta has.
Even Kashimo said that what make Gojo such a beast is that Six Eyes makes Gojo never run out of CE basically
And yeah, Gojo stated that Yuta, Hakari and Yuji had the potential to surpass him, early in the series. Last chapter he reassured Yuta of that and even pointed out that his family heritage could be more blessed than Gojo's