How do Ergo layouts make it harder to touch type? I learnt touch typing after getting my first ergo keyboard, but I found it a transferrable skill to normal qwe

How do Ergo layouts make it harder to touch type? I learnt touch typing after getting my first ergo keyboard, but I found it a transferrable skill to normal qwerty staggered keyboards with little need for adjustment. My error rate might be 1% higher on none-ergo keyboards, but otherwise I don't notice much difference. For reference, I use a ZSA Moonlander.