vbman213 wrote:As have I, but what differences between these two identical Pi's (same hardware and same software) would cause such a sharp contrast in performance?
Just to confirm the situation - are you literally
using the same (external) hardware and software ie. uSDHC card, power supply, cables etc. and just
swapping the Pis? (Power supply and/or uUSB power cable differences could contribute)
Still running Raspbian Jessie or Stretch on some older Pi's (an A, B1, 2xB2, B+, P2B, 3xP0, P0W, 2xP3A+, P3B+, P3B, B+, and a A+) but Buster on the P4B's. See: https://www.cpmspectrepi.uk/raspberry_pi/raspiidx.htm