

Nextcloud is more featureful (more apps like notes and hardware 2fa support). That is currently holding me to NC.
OpenCloud (fork of OCIS not original OC) is very similar when it comes to core functionality, but is missing those few apps I do not want to let go of.
Also note that nextcloud stores files in a very natural manner, where your file names and directories are stored the exact same on disk as on the interface. Opencloud does not do that. This is particularly handy if one day the app just explodes and refuses to run. With NC, you can just copy the files off the disk. Not so easy with OC.
VSCod(ium). Jetbrains IDEs are arguably better (I’ve used this some in the past), but I like OSS and having all languages in one IDE (even though some languages may not be integrated as well as others).