It doesn’t matter how “more cute” sounds to native English speakers.
The word “cute” is a one-syllable adjective.
eflnet.com/tutorials/adjcompsup.php
Form the comparative and superlative forms of a one-syllable adjective by adding –er for the comparative form and –est for the superlative. If the one-syllable adjective ends with an e, just add –r for the comparative form and –st for the superlative form.
Your #4 post is really very helpful !
I learned a lot from the link especially in the section of Exceptions where both rules can apply.
Thanks for your good work.