Played with both solutions yesterday SpriterDotNet was able to import everything semlessly, whereas Spriter2Unity struggled with some of the animations.
I ended up using SpriterDontNet but the lack of integration with Unity´s animator seemed like a huge throwback (I love state machines). That is the reason why I coded a simple solution that integrates SpriterDotNet with Unity´s animator, you cannot modify the animations in Unity but you can use the animator as you would do with regular animations.
A self-explanatory video:
PD: Be sure to turn on the subtitles