does subutex block other opiates from being viable..does it work just like suboxone?

I'm wondering if subutex allows the use of other painkillers or are the receptors blocked the way suboxone blocks the receptors and if so what are main differences between the two drugs..

: http://alcoholdrugstreatment.info/does-subutex-block-other-opiates-from-being-viabledoes-it-work-just-like-suboxone