It's not easy to say, because there are so many things about your aesthetics, and trying to negate some essential but common ones (like it being GOOD) would result in finding just some horrible primitive abomination.
But I think I have a good 'mirror reflection', something that opposes your key points while not doing a 180 degree turn on quality; something that I still like despite being so opposite.
Your art is complex. You use smooth palettes, soft lines, fine detail. Autumn draws firmly defined shapes, flat color, only as much detail as needed to convey the scene and no more.
You give glimpses of complex stories, mere peek into the world, a still of a huge whole, and often your stories are just implied - things happened elsewhere, at some other time. We just watch their echoes. Even your "Discordantly" managed to fill many centuries into just several pages. Autumn's stories are quite simple, well defined, she draws the key points. They are still interesting, but where your give aura of mystery, hers give a sense of action.
...on action. Your art is static. Even the more dynamic scenes still carry weight, inertia, the feeling of majesty that stills it. Hers - even the still ones are still buzzing with energy of the world, just momentary pauses in the dynamics. It's like Nightmare Moon versus Pinkie Pie.
You plan. You build. You give your heart, but besides that you engineer the right composition, making your work perfect. Autumn doodles happily, pouring her imagination onto the screen, just getting the raw inspiration without care or worry for proper techniques. She doesn't need them, the pictures tell what they were meant to tell.
Love you paint is gentle and passionate, shy and innocent and tame, even where you tried for explicit. It's the classic, pure love as found in classy(!) romance novels. Autumn's love is a hellspawn of compassion and stockholm syndrome, desperate, rude, hot, sad, explicit even if it tries not to be, and messed up - abuse, comfort, care, malice, trust, they are all mixed up, all in wrong places. Where you'd expect cheap sex, a deep caring appears, and opposite, a heartfelt confession turns up to be annoying self-serving whining; in the world where normalcy is in short supply, even suffering can turn up boring and/or be misused to serve self-interest of the one who suffers.
When you seem to take a dive off the deep end and try "weird", you still tightly hold the reins, creating fine art no matter what you try. You achieve your purposes, you win your battles, conquer challenges and come up victorious with the new technique, new subject, new concept firmly in your grasp, under your control, hammered and bent until it looks just perfect, tamed and obedient. When Autumn takes the dive and tries weird... she brings back the weird stuff. If you two were tasked with catching and delivering a live lion to a customer, you'd take a tranquilizer gun and deliver the lion in a comfortable cage. She'd drag the lion by its tail to the customer and toss it into his office. Then collect her pay and go to the hospital, to have her wounds taken care of, in that order.
You two are the opposites, and I love the art of both of you.