That’s good progress and a great base. I wouldn’t change what you’re doing. Muscle hardness isn’t just about the gear, it’s about consistent training, diet, and keeping body fat in check. At 6'2" and 80kg, you’ve still got plenty of room to grow naturally. At 23, your natural hormone levels are at their peak. Give it a few more years of natural gains. As you get leaner and build more years of consistent training, muscle hardness will improve, and muscle maturity will give you that dense hard look you're after. Patience.