My growing pains as a teen felt different, they were more bone/joint related as I recall. I ended up at 5'10", and my long bones were always aching. This was more like intense muscle soreness and stiffness, akin to what you feel if you do a hard workout after a long period of inactivity, mingled with the feel of muscle pulls/cramps. I was getting intense shoulder aches, back aches, that kind of thing. I kept careful body measurements from pre-T too, which has helped me track that growth.
My endo told me that the amount of muscle I packed on is unusual, but not abnormal. It's a mix of genetics and all of the weight lifting/training I did prior to starting T. I wasn't allowed to do any working out during my first 2 months on T (surgery recovery), either, so it was just hormonal growth. Now I just need to lose my excess fat. A little of it burned off during all of that, but not enough!