Oh neat an Art MBR!
Hunter's;
The first thing that stood out to me was the background, and the colour choices for the clouded-purple/blurple-ish atmosphere are nicely executed, and even the ground that's affected by the light, though the bright light feels too strong for where they are and in a very clouded area. More to the sunlight, it doesn't really feels like it's phasing through the clouds, and the sunlight could've angled better for the interactivity with the other parts of the background (and characters) since it feels unnatural to me.
Now to the characters, as what others said here, the expression feels not-so-expressive. Your character's expression to me feels stiff and somewhat looks different in compare to the other character/opponent in terms of artstyle, and as for the opponent, his expression looks pretty normal, unless his expression is supposed to be emotionless, I think it's possible to make his emotionless emotion more expressive.
I also noticed that your character's pants/jeans on the left (our's) got very tight to the legs while on the right (our's) is a bit more loose than left's. While the other character's attack's seems fine to me, the arm with your sword feels stiff in compare to how the sword is swinging
Asides from that, the perspectives are nicely executed with both characters, and I can feel the effects being what they are supposed to show, especially with the lightning of the blue flame with the opponent.
Kaneko's;
I really like with everything that's happening around your character, the shading, lightning, expression, pose, effects, and that sword perspective as well. It shows that things got a bit more intense, especially with those lightning effects signifying her powers.
But that's all the interesting parts while the rest feels empty or not finished (though I assume it's because with the IRL stuffs which I could understand). It took me a while to realize they were in a room when I noticed the baseboard and floor. I do like the dark atmosphere and how it interacts with the characters. As for the opponent, they are there and mysterious, approaching your character but that's about it, I think it would've been better to show the opponent doing something that caused to why things got intense in the piece
Conclusion;
It's a difficult vote for me since both did well on their own piece, with their pros and cons that are polar to each other (i.e Kaneko's expressive character, while Hunter's are the opposite, while Hunter shows a background filled with stuffs while Kaneko's doesn't).
Though I do have to vote anyways, so my final vote is Hunter. Asides from the flaws, there's something else to show in the piece that caught my attention, the background, characters and the fight between the two, while my full attention on Kaneko's are mainly on her character while the rest feels as what I said, empty.
And again, you both did great in this MBR!
