Flame and Misery have really similar lyrics, too. I read in some commentary that hide made about the Psyence album that he did it on purpose. XD
As for more similarities, there's "Psychommunity" and "Psychommunity Exit", and there's "Psyence", "Cafe le Psyence", and "Atomic M.O.M.".
Also, some of his Zilch songs are similar to his solo work songs. Like "Inside the Pervert Mound" and "Leatherface", "Fuctrack #6" and "Frozen Bug '93 (Diggers Version)", and "Electric Cucumber" and "Comment". And then there's the Zilch versions of "Pose" and "Doubt". ^^