The most commonly used AAS in medicine are testosterone and its various esters (but most commonly testosterone undecanoate , testosterone enanthate , testosterone cypionate , and testosterone propionate ),  nandrolone esters (most commonly nandrolone decanoate and nandrolone phenylpropionate ), stanozolol , and metandienone (methandrostenolone).  Others also available and used commonly but to a lesser extent include methyltestosterone , oxandrolone , mesterolone , and oxymetholone , as well as drostanolone propionate , metenolone (methylandrostenolone), and fluoxymesterone .  Dihydrotestosterone (DHT; androstanolone, stanolone) and its esters are also notable, although they are not widely used in medicine.  Boldenone undecylenate and trenbolone acetate are used in veterinary medicine . 
Xtreme mass (new formulation) is MethylStenbolone which is very similar to Superdrol. Xtreme DMZ is Dymethazine which is also very similar to Superdrol (a little bit weaker).
Staking both is a not a great idea. First, two are methylated so it’s a lot of stress on liver. Second, both are prohormones that CAN produces major side effects. Staking both might give you side effects that will outcome the potential good effects from them.
I think it would be better to do a one good cycle of Xtreme Mass alone or Xtreme DMZ alone.