This is from Bruce Kneller from another message board:
Pro Magnon 25 by PPL is 25mg per cap of this -
4-chloro-17a-methyl-androst-4-ene-3,17b-diol
Halodrol-50 by GN is 50mg per tab of this -
4-chloro-17a-methyl-androst-1,4-diene-3,17b-diol
This is like comparing test to dbol. The PPL product is the 4-halogenated precursor to 4-chloro-methyltestosterone while the GN product is the 4-halogenated precursor to Oral Turinabol.
You are comparing apples and oranges here.
I know the owners of both PPL and GN personally. Both people are great guys and very honest but both are separate companies that have nothing to do with each other.
Both products are quite effective in their own way but they will cause substantially different types of effects. The PPL product is more androgenic than the GN product. The GN product is has a higher A:A ratio. Neither will aromatize to estrogen due to the 4-halogen. Both probably have intrinsic active properties before conversion to the "active hormone" being 3,17b-diols (despite not having the requisite 3-ketone to bind to the AR optimally).
Both are very good products but they are absolutely NOT the same compound and anyone telling you differently is lying to defraud you or just can't read and made an honest mistake.
I hope this clears things up.
BK