There are many parts of the body, and when we find a part of the body that has Adonai's truth, it is still truth even if it does not come from the same part of the body as we do. Different parts of the body may look different, sound different, and have different functions, but if they are still part of the same body then the truth they teach is no different from the truth taught in another part of the body.
There are some ministries out there that tend to be very xenophobic, and what this tends to do is limit their ability to have access to the great works of Adonai around the world. When we try to reinvent the wheel all we are doing is limiting the ability of the body to minister to the body and introducing a spirit of pride and arrogance to the body that many cannot overcome.
Ministries that isolate themselves completely away from all others are limiting their ability to minister in a mature and complete fashion. All of this being said, there is one thing that must not be overlooked: promoting the work of another ministry requires active and mature discernment, wisdom, and understanding.
We cannot simply put everything in front of the young ones in the faith without first examining it to ensure that it lines up with the full and unadulterated word of YHVH. Even small errors can be detrimental to the very young.
Every work that is presented before the body, whether it is created by a ministry itself or a simple truth found from another ministry, it must be fully examined and vetted along with the one presenting. Only in this way can we ensure that the body will be edified in a way that does not detract from the ultimate goal of leading all to the unity of the faith, to maturity in the measure of the stature of Messiah's fullness, so that we are no longer to be like children, tossed around by the waves and blown all over by every wind of teaching, by the trickery of men with cunning in deceitful scheming. Instead, speaking the truth in love, we are to grow up in all ways into Messiah. (Ephesians 4:13-15)