Scolopocryptops spinicaudus? Centipede ID

[FraserFirs]

(Marion County, OR) I’ve been trying to catch one for a while now despite them being extremely common, and got my hands on this little guy hiding in the bark of a stump just today. My Seek app keeps saying it’s a Brown Centipede (Lithobius forficatus), but I have two of em and can VERY clearly see a difference. Just want to confirm that I found a Thorn-tailed Bark Centipede, and it seems pretty small for the species so I’m wondering how much more the little guy has to grow and how long until he is fully grown. (Last photo is of Lithobius forficatus for reference) Thanks!