You are not talking about equivalently built engines if all parts but the cam were stock. When the 360 arrived it was relatively low compression engine with smaller valves than a 340.
Guess I should have made my self a little more clear. All components where stock except the camshafts. All the heads we ran where J heads port & polished. 202 & 188 valves. There may have been a little difference in compression. However, the point I was trying to make the there is obvious a difference between the 360 & 340. The 360 works better at lower rpms & the 340 with a bigger bore & shorter stroke will turn more rpms & and runs better at higher rpms than the 360.