Yes Zoro learned how to cut steel in alabasta. That's a general technique he added to his arsenal.
Then in Skypiea he used all three swords, all of which are different ranks, and he cut steel again.
Like the one thing that's clear in the story is that higher tier swords do more wanton damage than lower tier swords. Note the word "WANTON"
Sandai Kitetsu was forcing Zoro to cut people too hard in Whiskey peak
Shusui was too heavy and Zoro accidentally created a bigger slash than he wanted to in Thriller bark and failed to execute 108 canon yet that's a move he literally pulled off the very first time he tried it in Skypiea
Enma causes Zoro to use to much Haki than he wanted to use.
The through line with all these swords is that when Zoro doesnt know what he's doing, the swords end up forcing him to use too much of his energy or do whatever the hell they want like suck him dry of haki. That's always true since chapter 115 back in Whiskey peak.
And what's also always true is that when Zoro masters the sword, THERE IS NO DIFFERENCE WHATSOEVER. Zoro gets stronger from mastering difficult swords. That strengh Zoro achieves from mastery DOESN'T DISAPPEAR when moving from one sword to another.
I'll repeat this until you acknowledge it. Oden used both swords to cut Kaido. So its oden who does the cutting. Not a specific sword