I don't think you know what you're talking about. You're making assumptions that each system has the same configuration (cpan, network) and same specifications.

"It cannot possibly have anything to do with SQLite nor the absence thereof, as can be plainly seen from the other installs which do not use it"

OP did not state the builds and cpan configs are identical. How can this "be plainly seen"? What "other installs" are you talking about?

"cpanm vs. cpan can’t have anything to do with it, because these are both simply shells."

You don't seem to understand the tools your commenting on.

What evidence do you offer for any of your claims?

Update: fixed typo.