Both are immature, sorta pathetic villains the idolize noteworthy bad guys in their own worlds(Vader and Itachi) and have dedicated themselves to fulfilling their work in spite of what their heroes actually believed when they died.
Round 1: Shin goes to assassinate Kylo on a whim. Snoke, foreseeing this, sends Kylo into the trap for training. The fight takes place on Endor, where Ren is looking for Vader's helmet. Both are alone(Shin gets his little creature buddy though).
Round 2: Same as above except Kylo gets 15 Storm Troopers+Phasma while Shin gets 15 mini-Shins and the one big Shin clone.
Bonus Round: Rey vs Sarada. Takes place in Shin's home dimension and this is Rey at the end of the movie.
Remember this is the Naruto verse, not just Konoha Genins
Genins
The sand Siblings
Kabuto undercover was still consider a Genin
The Sound trio
Naruto
Sasuke
ichikacho
Neji
Lee
Honestly, want me to go on? How many Jedi/Sith minus a few that have legitimate feats? Most of there padawans minus a few are useless.
The Jedi's were getting there asses kicked in the damn clone wars against freaking mass produced droids. And you think there a threat to the Naruto verse?
I'd give this to Shin. Sharingan can basically mimic the force and more.
As for Rey vs Sarada...I'm actually leaning towards Rey despite Sarada having a sharingan. It's the weakest version, so it really doesn't have all the abilities like pre-cog and junk. Plus Rey uses a saber, and Sarada is like her mom and charges in with her fist. Either one could win actually, Sarada would just have to get more creative.
__________________ If you try something stupid, and it works it ain't stupid.
I said Rey..because the Bonus match was Rey vs Sarada.
Kylo Ren vs Sarada I do think Kylo would win though. Force choking kind of stops anything Sarada can do. Sarada doesn't have much or an arsenal, and has the weakest version of the sharingan before it gets super hax. IF Sarada showed genjutsu abilities Ren and Rey would both lose to her. But as is Ren would win because Force Abilities even from Ren > Sarada and her super strength/two tomoe sharingan.
The reason Rey and Sarada can go either way is Rey hasn't shown much force abilities besides pulling the saber to her. And had plenty of time to concentrate. Kylo biggest weakness is he's emotionally unstable and emo. Which if Sarada knew could possible use it to win but she doesnt.
__________________ If you try something stupid, and it works it ain't stupid.
I really doubt he can freeze someone of her power- All she needs to do is punch the ground and he's going to be off his feet.
Sarada's faster, stronger, has an attack that affects the terrain, and has some range in thrown kunai though granted the last won't do much except make him block.