We already talked in PM but when referring to polypeptides there are 100 million different variations possible and I already cant keep up. In 10 years you will need to be an endocrinologist to know a fraction of it. As to your question, the 2 do many of the same things including tissue repair. Hgh being the exact perfect 191 polypeptide will cover most of the bases of igf-lr3 to where igf-1lr3 will not cover the bases of hgh. If you choose its still hgh.....adding other peps for me would be a long haul running 1 additional at a time to see the effects and then slowly learning the combinations. Hgh still rules along with test of course given the hpg axis is driven by it along with the catalyst of all...insulin. not suggesting insulin but also not ruling out one looking into additional igf-1 as a promoter. Its all science so we read and then we experiment and all of our experiences willl be different to some degree and very much influenced by our different cycles and lifestyles.