That's a bit of a generalization since you could also apply that to Advent and A Fair Judgement if the only criteria for similarity in this context is "similar concept" despite the music itself sounding nothing alike.
I was thinking more, syncopated rhythms on the lowest chord (E in Deliverance, but D in Harlequin since the guitars are tuned down), varying levels of intensity on a vamp that lasted a couple minutes. With Harlequin it seemed like they were trying to capture a similar vibe to Deliverance. Maybe worth noting that they both segue into softer songs.
This intrigues me since I've listened to both a fair bit and never picked up on any of that. Post more info if you get the chance.
Okay, here you go. In Ghost of Perdition it's 6:58. In Deliverance it's 4:44. I dunno, those always sounded similar to me.
I'm familiar with his dislike for BtPISiO but this is the first I ever heard of him thinking poorly of the album in general. You got a link for that interview by any chance cuz I'm curious what the whole context of it was and if he does indeed dislike the whole album if there are any songs or sections he likes in spite of his generally blah feelings toward it.
Maybe not, I thought I read about his distaste for that album here. Maybe it's just BtPISiO. I know in Royal Albert Hall when he introduces Wreath he said something like "We're only playing this cause we're here, it's kinda shit but whatever". Knowing his humor it could've been a joke, but then again maybe not. If I come across the interview I'll post it here. I'm also basing this on the fact that they don't play a lot of it live. They do the title song a lot live but hardly anything else.
To be completely honest, apart from the first 3 songs I'm not very familiar with Deliverance. To me it always sounded like a bridge between BWP and GR, both being much better records. But when someone mentioned them reusing ideas from Deliverance in GR, I found it intriguing since those two examples always stuck out to me, but I never thought much of it.