I used to be a triple addict - 8x3 and 10x3 was the meat and potato set/rep scheme of my workouts when I lifted with a strength focus. My muscles were very hard 24/7, unfortunately I ruined it looks wise by being a perma-bulker at the time. My then wife was always accusing me of making a muscle during massages when I wasn't - I think they call it "tonus" , but it's very real. When I switched to more bodybuilding focused lifting with reps mostly 8 and above, it (the hardness) wasn't anywhere near as pronounced although some of my musculature was definitely larger (Biceps, side delts, upper chest, lats).