And PassTheHeadphones is Redacted. I'm actually surprised to see someone drop that name without any mention of Redacted, since they've been around almost nine years and I'm pretty sure the name change happened less than one month in.

RED was better than APL by almost every metric but after the APL ownership neglected the site and let it die, a bunch of the old staff rebirthed the site as OPS after maybe a year offline and they've done a shockly good job improving it. The difference is night and day. I still prefer RED because the userbase active on their forums got entreched much earlier on and they're fantastic. RED also has a larger library available, but that's not as meaningful as it sounds since in either case if you make a request for an album already on the sister site you can expect it to be filled pronto.