13.7 tons based on the notes on the verse page
Oh, my bad then! I didn't realize I wasn't correct. I can see where the problem is.
So yeah, Flame Knight has a lot less abilities, but I'm not sure how much that really matters with such a whopping AP disadvantage. Plus with the passive power of Phoenix Soul - S, its attack value is 'slightly' stronger, to really rub the salt in the wounds.
Being 6x more durable, being able to make forcefields comparable to its durability, being able to heal, all of those make Lizardy's AP disadvantage is a huge uphill battle at that stat difference. Matching Orbs and doing Combos will increase Flame Knight's power even further, making some attacks very possibly one-shot range attacks, and a Mass Attack would be a devastating AOE that could fry many pieces of her all at once. Plus 'Burning Flame's creation of Bomb Orbs is probably devastating for her, because without enhanced perceptions, Lizardy still can't see or sense where the Bomb Orbs are, they're going to be totally invisible to her. She won't be able to avoid where they're floating or dodge where they explode until it's too late and they've already gone off. Even with prior knowledge that Flame Knight can do that, she has no counter, and has to just be in constant alert that the air around her could explode at any second...
She's almost certainly more skilled, she's almost certainly more intelligent, she's more mobile, and she's shown great ability when it comes to dodging attacks and using her quirk in particular for that affect. She can regrow parts so she can even tank destructions thanks to the AP disadvantage...But she's going up against an opponent who has to try a lot less hard and take far less risks. She still has to ram with her body parts to deal damage, which is still going to put them at risk. She needs to avoid letting herself get trapped in an AOE Mass attack or snipped by Flame Knight's better range. And she needs to overcome a 6x AP advantage against someone who can both put up defensive forcefields and heal, all while 'healing' will tax her stamina greatly judging by her weaknesses section.
She's fighting a brick wall, except sometimes the brick wall has a protective covering, heals the chips she makes in it...And sometimes the brick wall will AOE explode and the air around her will randomly explode without warning. I think Lizardy will lose pieces and parts, take nasty burns, and just deal too little damage against Flame Knight before crashing from her own stamina weakness. 6x difference is a LOT to overcome, and even with a much weaker arsenal than Homura had, Flame Knight has a mix of range, survivability, and unpredictability with Bomb Orbs in play to back up that big AP number against Lizardy's regeneration and skill.
I think I vote Flame Knight.