Here is my tier list ranking all the kgirls I've seen so far.
(I rank them within each tier as well from top to bottom, so for example Stella above Jane, Asia above Flynn, etc.).
Tier S (Best of the best, one of a kind, never get tired).
Stella (GKS): Most beautiful Kgirl I've seen and stellar service. I think Jane's service is slightly better but Stella has a slight upper hand in looks. Also my experience with Stella seems more one-of-a-kind based on our interactions and what she told me whereas Jane's routine seems more scripted and mechanical, but nevertheless still amazing.
Jane (P2 G): The first Kgirl experience that blew me away. Similar routine to Stella. While Stella looks like she could be a model or actress, Jane looks like she could be an SNSD member.
Tier A (Top tier looks and service).
Asia (GKS): Super hot, thin MILF. Tall with big boobs, super passionate DFK. I probably spend more time kissing her than not kissing her. Always a solid option to go to when Stella or Jane aren't available, never get tired of her. Easy parking and location too.
Flynn (AsianWorld): Super hot yet incredibly down to earth. Funny and playful yet sexy and sensual. Wonderful soft BBBJ and sensual DFK. Easy to talk to which makes the session all the more memorable.
Yoco (MinClassyExotic): Truly interesting experience not like your usual Kgirl. Eager to please, affordable and with multiple pops. Tall and curvy, really outstanding service.
White (CKD-OC): This girl's tongue is wild. Her energy is unmatched. Always eager to please. Dependable. A must see if you like rimming, tonguefucking your anus, and prostate massage. Thin with nice boobs. Face is average but service more than makes up for it.
Tier B (Repeatable, solid options, you won't be disappointed).
Eleven (AsianWorld): Really young and hot, accurate pictures. Service a bit lacking though.
Cyma (P2 G): Tall and toned with big boobs. If you think that VROK360 girl on YouTube is hot you will love Cyma. Not into DFK though.
Elle / Venus (CKD-LA): Really nice body, decent face. I set my expectations too high so felt disappointed but if you go in without any expectations it should be pretty good session. I guess YMMV, like Jazmin.
Amber (GKS): Really good service and tries hard to please. Like others have said, she's like Stella and Jane, but slightly less attractive. Still a hot MILF though.
Jazmin (CAK-LA): Super hot, accurate pictures. Like others said though, YMMV. Our chemistry was OK. Not the best, not the worst session.
Coco (GKS): Thick and curvy, super hot face. Young looking. Really long and thorough pre shower. Did I mention her face is super hot?
Min (MinClassyExotic): Hot girl, her body type is my ideal (not too skinny and with natural C cup boobs, similar to Jane) but I went in expectation the best BBBJ of my life and left disappointed. Again, never go in with high expectations or you will be disappointed.
Tera (CKD-OC): Okay face, really nice boobs and BBBJ. Similar service to White. Rimming and tonguefucking your anus. Looks were okay but service more than makes up for it.
Tier C (Would not repeat).
Suzy (AsianWorld): Bleached hair, tanned body, probably in her 40's. Nothing worth writing home about.
Yoji (AsianWorld): Really good service, but looks are definitely not my cup of tea. She looks like my old aunt who is in her 60's. But her body is like a 20-30 year old. Petite and tight. Great energy and stamina, but I simply can't look at her face without seeing my old aunt. Or Yubaba from Spirited Away. Or one of those old ladies at those Latin dance competitions who don't suit that style of makeup.
Aria (LA KAngels): Young and hot, but none GFE whatsover as advertised. Only LFK, also looked nothing like the pics, but still young and hot.
Girls I haven't tried yet on my TDL:
Niya (GKS), Thai Bella (LA KAngels), Bulma (SAG), Heri (CKD-OC).