No, about eqail early and late MiG-21PFM in using SPS system - it is my guess, at my look two so difficult fighters can't have one modification code PFM, as i suppose main differences between its - new canopy and seat.

By the way i dont know why, but in ex-GDR Air Force (NVA/LSK) MiG-21PFM (operate only late type MiG-21PFM) officially called MiG-21SPS (SPS-K if was mounted GP-9 underfuselage gun pod), so it is another one fact - late MiG-21PFM had SPS system.
About early type - i don't have full information, but IMHO early MiG-21PFM had this system too:
1. MiG-21PFS had this system.
2. MiG-21PFM was upgraded version MiG-21PFS with same engine.
3. Late MiG-21PFM had SPS flaps, so why early MiG-21PFM hadn't its?