Getting bigger is still inevitably going to come from lifting heavier and heavier weights, albeit for higher reps. I don't think you've gotten strong enough yet to see any major muscular size gains, for someone of your weight the strength levels wouldn't indicate a huge degree of muscle, more than likely a higher bodyfat percentage.
I would still focus on strength if size is your goal, preferring to go for the second routine as you can hit each area three times a week. For a guy your size and height you'll really need to be looking at hitting 400/300/500 at a minimum to really see a large build. Once at that point I'd cut the fat down to really see an impressive physique.
Welcome to the forum.