Luffy used Red Hawk before Udon training, so that's fine since Oda portrayed some G3 moves in the same light as some DJ moves in WCI.
We can make exceptions where they're called for such as SN's joining the ranks of a Yonko. Capone for example had a chess piece rank like Tamago in Big Mom's crew but was obviously stronger.
Beside said exceptions Headliners are meant to be comparable, unless one is stated to be above the others.
So from named DJ move
to basic unnamed kicks
we're seeing clear significant progression.