I'm still not sure what the first (darker) tartan is but it's neither the (Irish) Forde nor the Irish National tartan and it doesn't appear to match the thread counts for either:

Forde: G4, K4, DY4, K8, R4, K4, R4, K8, DY4, G64

Irish National: G106, DG10, Y10, DG18, K10, W10, DG4, G14, DG2, Y4

It may be a 'fashion weave' of some kind or something else. Anyone figure this one out yet?