If Maki hits Ruby, Ruby gets 1 shot due to Soul Split Katana being able to bypass aura
If Ruby hits Maki, Maki also gets one shot because if you get hit with a scythe that tends to happen
Ascended Ruby scales significantly above 224 tons due to being superior to he entire team + jaune combined, who are individually stronger than Volume 4-5 Weiss, who ca summon and kill Queen Lancers
Maki scales significantly above 124 tons due to due to stomping Cursed Naoya
Both are comparable in skill since Ruby has arguably better training while Maki has Information Analysis
but Ruby is 2 times stronger, has significantly better LS, has sniper shots that she can, well, snipe Maki with and weave in between her close quarters combat, and her semblance is a blitz-level amp
Not to mention, Ruby getting hit with any of Maki's other weapons means her aura now works, meaning she can afford to take hits much easier. Maki's only real chance here is 1 shotting with Split-Soul Katana, but that's assuming she pulls it out before she gets sliced in half or shot in the head by Ruby
Ruby just needs to hit Maki a single time and Maki is dead cuz she gets done dirty like Gojo did. Maki needs to accomplish the same thing with Soul Split Katana, but she has much fewer natural advantages.
voting Ruby