I think some strucutural similarities are obvious, others forced and others are a mix bag.
Obvious: LNF and UaGM. I can't believe people deny it, it doesn't mean they are the same song as the melodies and tempos and everything is different, but it was clearly written off UaGM chart. Slide up and down guitar intro, drums and bass kick in setting the next section, guitar joins in, wacky speed section, then the verse... everything smells UaGM, even the solo. I don't think they are even trying to be subtle.
Mix bag:
Outcry - Metropolis, BAI and LTL, OTBOA and PMU. They share some trademark sections, like they started with the same framework in mind, but then it seems to have evolved into different arrangements with call backs here and there.
Like some pointed out, Outcry having a chorus makes a big difference when compared to Metropolis, but they have their fair share of similarities.
Breaking All Illusions and Learning To Live is more or less the same case. The way BAI flow between sections calls back to LTL, and the instrumental section, minus the F# moment has obvious similarities. The same thing can be said for OTBOA and PMU, some sections that say "Hi there, I&W!" but nothing more.
Everything else, including FFH and WFS, is completely forced. Far From Heaven, aside from being the piano + vocal song of the album that is reprised in the next song, has absolutely nothing to do with Wait For Sleep. Rudess style is different from Moore, and it becomes clearer here than ever.
Comparing any other song from I&W to any other song off ADTOE is, in fact, complete BS.
So, all in all, there is one back to back structure-built song, three songs that seemed to start off with their counterpart chart but clearly evolved different in the writing process and the rest are just different songs with no similarities in chart, melodies or whatever you want to force it into. People who say it's a rip off or "desperately trying to secretly rewrite their past"(
) is just as wrong as people who say "It's got nothing to do with I&W". The new album did what it what supposed to do: give a small shout out to I&W while being a brand new album. Nothing more, nothing less.