No you aren't breaking any rules bro. They are both board sponsors so you can talk about them all you want. They both are a great choice and have had great feedback. I have personally only used sarmssearch so I can only speak for their products. I had INCREDIBLE results with theirs, and I know their quality and purity is as good as it gets.
Uniquemicals does have a very good price point however, and the feedback I've seen from it suggests its a great product as well
You can't lose either way IMO