Not it's not the same thing, because of exactly what you stated. ONE HAS WEED IN IT. You collect it WAAAYYYY before you would resin. And resin is ASH, with the tar. Which is a MUCH different thing, and you can't argue the fact that ASH is in resin, and falls from the joint. Making the resinous buds MUCH cleaner than resin.
But the FACTS stated above are only reason to smoke 2nd, 3rd, 4th generation joints etc. Resin is still not a bad thing to have, or use. When needed.