Ran them both. Eq - 12 weeks at 500mgs and primo 200 a week (every 6 days actually) for 5 weeks - both seperate occasions. Eq, I had sleep problems, low bloat, i gained about 10-15 pounds of good mass, took 3 months for the old guys to come back. I ran primo for 5 weeks , low bloat and gained 10 pounds, recovered under 2 months, kept all of it. Primo in my opinion is the best by far