RWD S2 stag uses mac strut type front suspension so R33 will not fit.
I would say rears probably wont fit either.
C34 Laurel shocks are the best fit and are what i have, along with RWD stagea specific Tein springs.
Its the same style as s14 silvia but it think the silvia is shorter?
You will find that parts for a rwd stagea are a PITA.
Dmonic. Those green coilovers in the pic look correct, i would go for those.