Genuine question: Are RAS songs easier than the other groups songs???

I've said it before, but since it has been a while ago, let me say this first: Bandori is the second game I've ever played, so I don't know about a lot of things, I don't think I can compare Bandori to any other game.

I don't usually play lvl 27/28 songs because I think it will be a whole failure. I also avoid some lvl 26 songs because they seem harder to play than some other lvl 26 songs (excluding Popipa because I know their beatmaps are way more difficult than their established level) but I can play every single Lvl 26 RAS song (only two don't have fc, I also got my fc in Shakunetsu Bonfire on my third try and fc EXIST in my first try) while I can't finish Break your Desire, Passionate Starmine, I love your way, Kakumei Dualism, etc. A few months ago, I decided to try a lvl 27 song and I was actually able to finish it. This was the result:

I also tried Mind of Prominence and it was even better than This Game (I'll put the screenshot here when I find it). I didn't try any other song after that until last month, I think? I have JPdori now so I'm playing the new songs that will take a while to reach ENdori, especially Pappare Jinsei Banbanzai and I'm good?!?!? I was REALLY surprised when I got only 1 Miss.

SO, I've decided to play a few other songs that I wouldn't even try before aka A to Z Expert, Savior of Song and Rettou Joutou and this is the result:

EDIT: I FOUND THE A TO Z SCREENSHOT!!! I THOUGHT I HAD FORGOTTEN BUT I DIDN'T. HERE IT IS:

The difference is not that WOW but it's big, so now I'm curious: Are RAS beatmaps easier than the other bands songs? Does anyone else finds them easier to play?? Or it's just because I like their songs the most, that it becomes easier for me to play/fc their songs???

OH, I ALMOST FORGOT: The first lvl 26 song I was able to FC was Unstoppable!! Around March or April last year, I think? It was around Luka Luka Night Fever release (EN) because I remember being excited to fc LLNF after that. I tried other lvl 26 songs like Bad Apple and Kouga Ninpouchou but I couldn't fc it until May or June?? Now I can play others but for a few months Unstoppable was the only one I managed to get full combos (now i can't fc it, i don't know why I get a miss in the last notes 😩).