B+ Node for Pre & Cath Follower-5F6 shared vs Plexi sepa

[topbrent]

Question.

What differences would there be in tone/feel/operation in feeding the preamp and cathode follower from a shared B+ Node versus using a separate cap in the B+ rail specifically for Preamp and for the Cathode Follower tonestack?

(Lets ignore the difference in capacitance from the JTM45 to the later Marshall circuits for this discussion.
Lets pretend both amps are using the same value caps in the b+ rail.)

For example, both the 5F6A bassman & Marshall JTM45 used a shared B+ node to feed both the preamp and cathode follower tonestack whereas all of the later Marshall iterations of the circuit, ie 1986,1959/1987, 2203 had a separate cap feeding those circuits.

Discuss.