dimethazine is two di methyl dht molecules bonded together with an azine (nitrogen) bond. it is much more androgenic, and less anabolic d/t the nitrogen bond.
however, boladrol is incapable of being 5a reduced, and does have a low androgenic effect. In low dosages, it shouldn't be a worry. in higher dosages, it is a risk.
and as always, androgenic side effects are always a risk, as they all act on the androgen receptor.
boladrol is the less riskier of the two though.