Now normally, when a topic is extremely close like this we either
A. Roll Dice if both people agree to it, to avoid maximum salt or
B. Leave it for the all mighty Tree to call it.
And when Tree calls it, she looks for three things:
1. Who is on the offensive the majority of the match
2. Who has received the most damage
3. Who died first down to the very last split second
In regards to the first requirement, it's difficult to say exactly who has the upper hand for the majority of the fight. From the get go, it's an exchange of close and usually hard-hitting attacks, up until the 7th post, where Kaela puts the first "stand-off" and starts the real killer attacks. Although you could say Kayla gets a upper hand here, Kaela quickly recovers and the back and forth begins again, so there's no real winner here in that regard.
As for the second one, you can really only judge fairly up until that 7th post, because that's before the death blows start rolling in and the real controversy starts. By that point, Kayla has hit her elbow and her head falling on the floor + has a dozen cuts from the shattered vase that flew at her on her limbs and her waist. Kaela has been hit by electricity at three different points: in the back, on the shoulder, and I'm to assume somewhere in her stomach/torso area (since that's the easiest spot to curb-stomp).
I think an important note here is their state otherwise from these damages. Both are dazed from sparks flying and vibrations
( ͡° ͜ʖ ͡°), however it's directly noted that by the point of the 7th post, Kaela is already "fighting not to pass out". It also goes on to say she was "putting all her energy into vibration that shook the building". This, I feel, is pretty important when you read about everything on past this point - especially when looking at the third requirement.
The 8th and 9th post don't matter in so much that they were empty attacks. Kayla goes in to stomp her neck and is thrown off. Kaela swings dry-wall at her head and misses. They both could be considered "kill posts" but they both missed.
The mood changes again in the 10th post. Kayla sends a bronze statue flying into Kaela's head. It hits.
11th post, Kaela touches da titty and sends in vibrations using "the last bits of her gathering strength".
12th post, Kayla concurrently sends tender electricity through the bae's face.
This normally is where the topic would have ended and a winner was declared. It's basically another "final stand off", where normally the third rule would come into place and it comes down to how quickly the other person would die, but then Wild comes back with the 13th post. I don't think this can fairly be counted for two reasons: 1. it's already pointed out in the 11th post that she used the last of her strength and 2. in my opinion, it's an overkill post. We already have our stand off, and you can't fairly say in the post for certain that organs were exploded, no more than you could say fairly for certain that Kaela's brain didn't fry the moment she took a fry to the head.
And so, we really boil down to the third requirement.
We know at this point, Kaela is fighting in a very last-ditch effort manner. It's been stated several times over at this point how exhausted she is and how she's already used most of her energy in the 7th post. Kayla seems in a better state at this point. There's noted to be a pain in the back of her head, but she doesn't seem to show any signs of serious tiring or disorientation.
Now I can't be certain how long it would take for Kayla to die via Pikachu Shaking Syndrome, so I'm going to go off the assumption that because of their states at the time, Kayla would have the stronger attack then and therefore Kaela would be the one to die first.
That's my verdict. Kudos to you if you actually read through all that.