I will write my rebuttal and/or considerations later I said. I honestly dislike both options, but I would prefer Option B over Option A overall. I still strongly agree they're all the same canon as even Eficiente even if he agrees with profile splits still agrees them being treated as same character/canon but over the course of different time periods.
There are also criticisms with option B, given Mario is simply inconsistent; he's not like Hulk where there's a lore based "His power varies via being angrier" or other Empathy based powers or Superman being stronger based of his "Solar battery genetics physiology" It's just writers/programmers themselves being contradictory to each other where little to none of them care about powerscaling/battleboarding in general. But if anything, there are few and showings statements about getting stronger via progression but clearly no statements getting weaker but just showings via game to game portrayal. RPG games specifically have the level up systems albeit level 1 reverts next games. And common plots of Mario being fodder against main villain/final boss but then later becomes their equal. And the other is taking the DK Rap lyrics
"He's Bigger, Faster, and Stronger Too!" But there are still counter arguments against that too. And the biggest issue about the "Getting stronger via progression" is that Partners and Time kind of made the baby versions of the Mario bros just as strong as the adult versions. Kind of confirming the power levels tend to be back and forth.
As I said before, I'm slowly but surely repeatedly losing interest in debating Mario's tiers via repeated topics, exhaustion, the fact that all the real Mario experts such as Dino Ranger Black left the wiki resulting in the same downward spiral that discussions (Not just Content Revisions) that several other verses such as LoZ and MLP have been going through. The actual "Downgrades/Upgrades" and what not are actually the least of the issue, but just talking about the verses in general just doesn't seem fun anymore.
But one of the main things I will expand upon is perhaps remind us all why the continuity is just one big continuity and while Cosmic lore and stuff should still carry over even if we assume Mario cast get stronger as they exercise/adventure but weaken when they've been sit around outside of adventures that we either do Option A making separate pages/keys for different periods, or option B with just having variable tiers. But variable tiers within a single key should not try to make the gaps too extensive; not something like Tier 9/8 to Tier 2. But I better get to that later. I just need to gather my scans for each canon connection claim.
But I will say this, anything below Building level is pure downplay. Even fodder enemies such as Goombas, Koopa Troopas, and Monty Moles have fairly consistent Building level feats, there are giant blocks in World 4 of SMB3 where fragmenting would get 9-A. Mario also one-shots Banzai Bills who consistently pile through giant sections of brick blocks that would get now lower than Tier 8. And I'd argue anything below Tier 7 amongst the Seven Star Children is also out of the question for the most part as Bob-Ombs do have Tier 7 explosion feats, though inconsistent given some survive their own explosions while most are still glass cannons.
I also think this statement is also even more blatant, but we are definitely not upgrading every single fodder enemy to the level of Mario. No galaxy level lava, no galaxy level galaxy level bombs/fire arms especially ones not magical/supernatural in nature, and things like "Throwing objects to harm a high tiered character" is something we give credit to the throwers and not the objects being thrown unless there's some mystical nature surrounding object in question.
But who knows, I might be able to come up with some solution. But when I explain the canonicity reminders, I will propose some conditional branches for any possible variables and/or profile splits via eras/sub-series/spin-offs. But given me time to explain them later.