ADTOE definitely doesn't use Images And Words song structures
Sorry, but that's just demonstrably false as to some songs. I broke down the similarities between LTL and BAI in great detail a week or so ago. If I can find the post, I'll add a link.
The songs don't copy the IaW song structures note-for-note (though On The Backs of Angels comes pretty close)
but the flow of the album is strikingly similar to IaW, with the exception of adding a ballad to end the album.
Song structure and note-for-note. None of the songs are even note-for-note copies and, even with the structural near-identity between LTL and BAI, the two songs are ultimately quite different. And, while I see some similarities between PMU and OTBOA and between Met1 and Outcry, I find those easy to overlook. BAI hit me almost instantly after my first listen.
I don't think the individual songs sound like rip offs of their counterparts on IaW, but there's too many parallels between the order of the songs and the songs they represent as being "like" IaW songs.
Here is what I mean by the flow of the albums being similar.
OTBOA = Pull Me Under, this has been discussed already. It's not the same song, it's not the same riffs, melodies, etc, but it sounds like PMU was the inspiration for this song. This is the one song where there are some musical similarities to be found, structurally.
BMU, BMD = Another Day, obviously these two songs have nothing to do with each other, except they are "trendy" songs on their albums.
Another Day screams early 90s r&B/smooth jazz that was popular at the time. BMU, BMD is very heavy and dark.
LNF = Take The Time, again, songs don't sound the same, but they're both the first big showcase of the band's chops and prog rock writing abilities after opening song and mainstream hit attempt.
This Is the Life = Surrounded, don't sound the same, but are breather tunes, even if Surrounded rocks a little harder, solo seems to be inspired by Under A Glass Moon solo.
at this point the next two songs are switched.
BITS = Under A Glass Moon, definitely don't sound the same, but heavier riffs respective to their albums, lots of crazy stuff throughout.
Outcry = Metropolis Pt 1, song/long instrumental break/song. To be fair, this song structure exists in a few other songs throughout DT's catalog prior to ADTOE, this may be the last time the band has written a song with that structure, though.
FFH/BAI = Learning to Live, yes they are completely different musically, but this is the more obvious example, especially with each big track reprising the main themes from their respective album's lead-in track.
and on ADTOE, they added one more song to close, a ballad, and it works against the overall theme of ADTOE.