Well, there are way more artists on ethereum so it can be related. But it also cost way more and it's kinda a risk to start on eth since you don't know if you won't end up spending gas without selling anything. Imo, That specific selling point (+green chain) made a lot to attract tezos. It would be interesting to know in percentage how much of western artists use eth vs tez and how much emerging country artist use eth vs tez. How many times can you see on twitter saying that making nfts on tezos is their job and how they can pay their bills using it