Ive driven a lot of each and unless you were to change the manifolds and compare on a single car, you wouldn't tell the difference. "It runs like a model T" They were notorious for a few weak points tho... the tin vaporizing plate on the inside can rust out over the winter and you'll be dead in the water, or burn through while driving with a baddd loss of power, then the packing nut below the air horn can leak making for a hard start/lean run. Ive also seen several that had the needle cranked in tight and scored the seat from trying to lean out the rich burning fried internal plate problem. One main jet actually had the orifice soldered and redrilled way smaller for the same correction.
If you really need it, Id pay $25 for it with GOOD exhaust threads. A wall hanger needs a few #10 X 6 inch wood screws into the studs LOL... ws