I haven't really used friendica before. I checked in every once in a while, esp. because tusky does support access to it, but the website is not really as easy to use as Mastodon. It does have a few interesting options though, like properly threaded views and rss feed access. So there's that.
Not that you can share those rss feeds to mastodon, I think.

I do see how this is way more comfortable for some use cases. For one discussions I see on Mastodon show up threaded properly. It lends itself much more to reading stuff properly, following along on feeds and all that.
Doesn't seem quite as nice to discover stuff or do some quick of the cuff discussions like in Mastodon though.