I have other thoughts, but these are the most objective ones:

• The theme was integrated with all applications I tried and I didn't spot any problems with it. (I'd tell you I liked it, but that would be subjective)
• Installing via Pamac required knowing what source (repos, AUR, et cetera) you were installing from or to try multiple.
• My Brother wifi printer couldn't connect and I didn't find a guide to resolve it.
• I couldn't get audio to work correctly on my Thinkpad X1 Carbon 9th Gen.
• The forums seemed to be active.
• I ran it for a week in a VM without breaking anything. Didn't run for any length of time on bare metal due to the printer and sound issues.

Compared to Fedora and EndeavorOS:

• Default GNOME theming, of course also through.
• GNOME Store will show you all available sources when you search for the package on Fedora. For EndeavorOS I have to search two places on archlinux.org and flathub.
• My printer worked with Fedora out of the box. For EndeavorOS I found a detailed guide they put together.
• No audio issues on either.
• Fedora also has a large forum. The EndeavorOS forum seems to have fewer users.
• I ran Fedora on my laptop for 6 months. When I upgraded between versions, I ended up with two versions of some applications like "Terminal" and "GNOME Terminal," which was confusing. No breakages.
• I've been running EndeavorOS for 14 months. I broke GRUB when everyone else on Arch and EndeavorOS did. I still had the live USB, and EndeavorOS provided instructions on how to fix it, although it was written for Ext4 and I had to make some educated guesses since I use BTRFS. I was successful and that was my only breakage.