A number of the TH tracks share certain musical motifs that make them more consistent with the style of this album...
I'd be inclined to rule these out, including Semena Mertvykh (which shares a motif with Gemini - and the mention of being proud of the VHS technique seemed to be a reply in the context of those sounds they made especially for the album) and Jacquard Causeway (rather nicely produced percussion and one section in the melody matches with Uritual).
White Cyclosa is clearly in the film soundtrack vein, pairing well with Gemini's sound, and is far away from the old stuff - I really don't think it is that.
So, the suspect songs that aren't consistent: Nothing Is Real and Palace Posy both seemed like the two main 'odd ones out' to me, right from the start... But: if it's a remaster of a very early track - i-e pre-Twoism - Nothing Is Real actually sounds more like MHTRTC era than something from Old Tunes, otherwise I'd be completely split on those...
The one that jumped out as sounding like an 'old tune' when first I heard it was Palace Posy... The synth sounds, the way it was written, and the contrast with the rest of the album, all give that sense. If it's not the one, then it's one hell of a red herring to write something like that and put it on the album despite it being very much at odds.