I've got both currently but comparing them is a little hard to do.

1) '71 1800E coupe with bone stock B20 E engine running D-Jet
2) '63 PV544 with 2.2 liter B20F, header, big exhaust, 1.6 roller rockers, Mallory coil on Crane Ignition and DCOE's.

The B20E is muted by the extra weight in the 1800E. My R&T road test reprint book shows a '63 B18 PV weighing in at 2160 (Curb) and 2500 (Test) weights. While the '71 1800E coupe they tested (minus the A/C mine has) weighed in at 2535 (Curb) and 2835 (Test) weights. So around 350 lbs more? And the other things I've done to the PV's engine so far all make it a bit stronger than the B20E as well.

The 1800's B20E pulls fairly strongly at all rpms, but I can feel the torque curving downward as I approach the redline. It used to have a boggy feelingoff the line, but that seemed to be related to the vac retard distributor, I unhooked it and retimed it (slightly, to just south of the pinging) and it is a lot snappier off the line now.

The PV's engine has a broader torque plateau. With the stock head I don't really think revving over 6500 rpm or so is a good idea but with the DCOE's it seems like the torque barely drops off to that level at all. At pretty much any RPM if you open the throttle the engine will instantly be pulling hard. Now if I can just get it to idle smoothly and lean it out a bit so it doesn't use as much gas it will be all good!