Superdrol has proven to be one of the harshest legal AAS you can buy... it's incredbily potent, with strength and mass gains coming within days of injestion but the sides such as liver damage, blood pressure, and just lipids in general really take a hard hit.
Phera-plex is supposedly lighter on the sides, despite being more androgenic of the two compounds. Results and opinions vary between these two compounds, but they both seem to have great results. Superdrol however, seems to have the upper hand in potency- WHEN DONE RIGHT. Proper precaution and mature use proves Superdrol to be one of the best ones out there at the moment. Phera-plex, if not beside it in its effectiveness, is right behind it.
Either or, both compounds are 17aa, which means liver toxic. Don't run it for more than 4 weeks, and have proper ancillaries... milk thisle, ALA (preferably K-R-ALA, and NAC should be pre-loaded 2 weeks ahead of time. Blood pressure reducing supplements are highly recommended as well: hawthorne berry, CoQ10, and celery seed are great.
Just be real careful with them, and as you probably already know, don't go near alcohol when using it.