I'm not sure, I haven't tried either of those products. I see they get relatively positive feedback on bb.com though (for whatever that's worth, lol.) The T2s can be suppressive alright, but the 3,3' is relatively inactive in most regards from my studies, side effects as well as effects. The 3,5' is a very unusual analog, I'm not sure I've ever seen much human data on that molecule. I believe the 3,5 is relatively (compared to T3) suppressive, but it's been so long since I've looked into it I must admit I'm not up on the latest research.