In fact, Fatal Error!Sans did not lose to Fatal Error!Sonic. I think you did it because of the last scene. The video creator (Revolver) wrote in the comments that Fatal Error! Sans did not lose. Therefore, I hope that those who read the comments will not be divided.
Even tho Revolver said F.E Sans didn't lose, in my opinion if the fight keep going he would lose in the end. Since as how was shown in the video, F.E Sonic had already taken/eaten a lot of his code and his body was slowly becoming one of his minions due to the loss of almost all of his code.
Gotta say, love their all designs, pretty accurate, and also, got another reaction for ya, can make them react to this new AU called Crack!tale by Red Eye Animation? :3
Oh my god... Your reaction videos are Amazing!!! VERY VERY underrated, You not only have several sans aus, you have ones like Color sans and Fresh, who are NEVER included in reaction videos. Subscription added, and you deserve way more!!! I also have an idea, Nightmare vs Nightmare mode sans by revolver animations, I would love to see a reaction vid.