i might be slightly bias but i'll side with BRB.
plus this pic is better:
Beta Ray's hammer can hit Apoxy blue lips if he goes intangible and i see it able to eventually go through his shields after all apoxy lips shields arent magnetic shields like magneto.
also due to CIS/PIS that clings to apoxy blue lips he would job making it a worse beating from a guy who doesnt hold back and beats on heralds regularly..
i am fully aware of his other minor less used abilities aside from shape shifting, energy blast he really doesnt show much of anything else..
the only ability that might help him if he actually proved it could work on a herald being and not just a human is the brain explosion ability.
" @RiseofApocalypse said:" Thor = BrB. Harbinger of Apocalypse >= Thor. Apocalypse > Harbinger of Apocalypse. Apocalypse wins. ""Harbringer"? "
No BRB doesn't stomp, if anything he's equal to Apocalypse. How do I know? Because Apoc beat Thor, and Bill beat thor. Both with little effort, it's not much but that's the only comparison I got.
It all depends upon how long Bill would be holding back against Apocalypse.
Apoc is badass if he uses all his powers including strength enough to choke out She-Hulk with one hand, in battle teleportation ala Nightcrawler, great speed, better than Mr. Fantastic stretching, energy absorbtion, force fields (held Exodus), energy blasts, flight, size changing, detached controlled body parts, superb senses (sensed invisible High Evolutionary and cloaked Watcher), tons of experience, genius intellect, and some undetermined level of TP/TK.
He is a worthy adversary for BRB even in a random encounter.
Apocalypse has overpowered the hulk and thor who is at least just as strong as brb and Apocalypse took thor best shot right to the chest and didn't flinch and laughed at black bolt's whisper and when he is weakened and liquefied he still was able to pull himself back together.
hell he could stretch around any of brb's attacks