I have both of them in the foundry, but due to circumstances I can only claim one soon and the other one down the line.I myself am indecisive so I thought I’d come to the community for help. I main Octavia but have built her for steel path if that information is relevant in your comment of helping me choose. Thank you to those of you that help me choose.
Saryn, purely due to how the frames are accessed.
Mirage is acquired through a quest you’ll do at some point anyway, Saryn is from a slightly annoying boss to run in Sedna (requires you to do arena points to gain points which can then be spent to access the fight).
Just generally, if in doubt, pick the one that is hardest to get.