YOU SAID:

I like the red wallpaper more better than the blue

INTO JAPANESE

私は青の壁紙よりも赤い壁紙の方が好きです

BACK INTO ENGLISH

I prefer red wallpaper to blue wallpaper

INTO JAPANESE

私は青い壁紙より赤い壁紙の方が好きです

BACK INTO ENGLISH

I prefer red wallpaper to blue wallpaper