These look so nice! I think both make a bit of sense, but one-finger wings don't seem useful for walking/running, so that looks more like a resting/steady stance more than one they'd use to get around! I'd think it's like how a dragon would get on all four to attack / before breathing fire on a target.
Other than the denser tail, I think Stryx follow bird anatomy quite closely? They're just larger, but everything is proportional, so I'd say they still stand the same way their small relatives do!
And thanks for your opinion! Yes, I agree. On second thoughts it does make more sense to have Stryx bipedal/bird-like. And it would propably look less weird xD
And yeah!! I was gonna agree fully on the dragon stance at first but then I went "wait a minute" lmao
I think both ideas are great though!! Esp. since it's a fantasy world and kinda up to us >:3c