X3 and X4 size comparison

Hi all, I did some search in the subs but didn’t get the answer I like to have.

Basically I want to know from reading experience perspective, is X3 a good alternative to X4 in displaying text and the experience in general to read chapter by chapter. Because having classic Kindle PW to X4 classic v1 and I love the smaller size reading experience. Now I’m in market to get an X3 with even smaller screen. I like to see if someone has a fixed limit of screen size (like X4’s one) to tolerate.

Any red flags or gotchas about X3 I should know too?

Thank you all!