I can't remember where I first found out about Tear Ceremony. It was probably the old Ambientrance review website (some of it still up) if anyone remembers that.
I like all four TC albums but Film Decay is probably my favorite. There is something about these albums that really grabs me, hard to say exactly what it is. I'd encourage anyone to check them out.
Admittedly I never really listened to Sonogram. From what I remember it was beat-oriented, melodic "idm" type stuff. I just added the last Sonogram album to my Bandcamp wantlist so I could check it out later.
Todd also has an indie rock band called Crushed Stars, which I am hearing for the first time right now through Bandcamp.
Anyway, the Tapes and Topographies s/t album is really good. Looking forward to the new one, which I didn't even know was coming out until just now.