John Vega just tunes as far as I know.

CFT, well their work is great and their cars win races. They do it all, build, tune, fabricate etc...

DC does not tune cars, and to this point I have not seen any of their cars win any kind of races be it drag, road, etc..they build some nice looking stuff though.

So you really are not comparing apples to apples although I will say if you are building a race car (drag) and have deep pockets CFT is the way to go.