Similar songs in your opinion
 

some ayu songs are really similar, i'll list those i find similar~ do add your list too :yes

1) AUDIENCE, Trauma, Fly High, too late, Boys & Girls
2) Pride, Marionette
3) evolution, UNITE! (similar in my opinion but evolution is much nicer :D)
4) Connected, Naturally
5) M, Free & Easy (soft at the start and a powerful chorus~), momentum
6) talkin' 2 myself, decision
7) BLUE BIRD, fairyland
8) Together When..., fated

will add more when i think of the songs~!

Definitely UNITE! & evolution.

Because of You, decision & identity all have a really similar bridge.

GAME, 1 LOVE & (don't) Leave me alone sound very alike too.

-M~Free & Easy~Momentum
-fairyland~Blue Bird~glitter
-my name's WOMEN~(don't)leave me alone
-No way to Say~Carols~Days

Marionette and TEDDY BEAR...
They just change some key in the middle of the piano intro...LOL

-decision, until that Day,1 LOVE
-(don't) leave me alone, is the LOVE?, Because of You
-GREEN, Will, Secret
-Heartplace, End of the World
-fated, Together When
-ANGEL'S SONG, Greatful days, Beautiful Fighters
-CAROLS, No way to say
-Dearest, HEAVEN
-INSPIRE, vogue
-GUILTY, criminal
-no more words, a song is born
-monochrome, WHATEVER
-It was, Dolls, Liar

i think it's RULE <-> Sparkle

@ ebginning i tent to confuse them, so I agree

Evolution/Unite!/Surreal
Fairyland/Bluebird
Flower Garden/+

mi|kshake~

BLUE BIRD/glitter/fairyland
UNITE!/evolution - I tend to get them confused, too, at first. :P

The only ones that ever really, really stand out to me are Blue Bird and Glitter. She has others as well, but those two always hit me. The mashup mix made it even more apparent.

The ones that I can think of off the top of my head are...

ANGEL'S SONG and fairyland
When I first heard fairyland, ANGEL'S SONG wouldn't get out my head. :laugh

(don't) Leave me alone and identity
Same key, I believe? And that stuff before the chorus in each song... You all know what part I'm talking about. :P

And there was another song I connected with criminal the other day, because I thought they both had a "haunting" feeling. But I absolutely cannot remember what song I associated it with! ><

Oh, I used to always mix up the lines of Boys & Girls, Trauma, and maybe even flower garden together. X3

Surprised no one's mentioned how similar decision is to is this LOVE?. When I first heard decision, it was like... wow, carbon copy, lol :P They're in the same key, some of the same chord progressions, and nearly IDENTICAL structure.

^I never really noticed...I'll have to go back and listen to them back to back now.
OK, listening to the first 20 seconds of decision, they do sound similar! Thanks for bringing that to my attention. :)

Blue Bird ~ Beautiful Fighters ~ Next Level

Blue Bird ~ Glitter

Love those songs thou! ^_^

DEFINITELY Life and Seasons!

^Oh yea, Life and SEASONS are very similar!

notice how the songs that sound alike are also very seasonal haha.

blue bird
fairyland
unite
next level

audience
boys & girls
evolution
too late
july 1st

green
vogue
surreal
will
duty

days
no way to say
momentum
rainbow

end of the world
missunderstood
about you
is this love
decision
talking 2 myself

Bridge to the sky is Not yet and everlasting dream combined
identity is a poor-mans version of 1 LOVE
It's so obvious reBiRth is a rip-off of LABYRINTH
It was is structured like (miss)understood (soft verse, loud chorus)

Marionette and immature are very similar when it comes to lyrics. :)
(don't) leave me alone and GAME are musically very similar to each other.
Lyrically 1 LOVE and GAME are quite similar.
Together When... and CAROLS somehow reminds me of each other every time I listen to them. I don't know why. o.O
And you mentioned how SEASONS and Life do sound a lot like each other. I have never realized this. :D

I guess these are the songs that came to my mind. ^^

Mirror and Mirrocle world! :P
Sorry I just had to do that ! lol