Both worked for me. Tried'em both at about a year apart. Currently on 3rd week of pct ( Formadrol from LG ) for Halovar. Put on 13 lbs - lost about 4. Noticeable size gains; even better strength gains. Bench went from 225 x 5 to 250 x 10. Deadlift: 300 x 1 to 315 x 3. All from 1 bottle & I still feel strong and gaining strength & size.