I disagree, if you use that logic then Paradise Falls and the Outcasts are raiders as well which would make the CW win as well. If it was a five on five match (A BoS, a Legionarre, a Fiend, and a Khan for NV and an Outcast, two Slavers, and three raiders for the CW then it would be a really close fight)
Well Outcasts have a lesser power armor and lesser weapons than Mojave Chapter.
Legionnaires have also proven to be able to take out power armored foes.
Fiends have energy weapons that surpass CW raiders arsenal.
And Khans aren't exactly hopped up psycho addicts like the CW raiders.
Overall the only raiders from CW that would pose a threat would be Outcasts and Paradise Falls.
Both of which have very limited troops and worse weapons and armors when compared to Mojave Chapter, Scorpions, Vipers and Khans.