Are Relapse Records and Unique Leader related?

Bands I still care for on each label

Unique Leader:
Mortal Decay
Spawn of Possession
Psycroptic

Relapse:
Cephalic Carnage
Mastodon
Suffocation
Uphill Battle
Burst
Neurosis
Burnt By The Sun
High on Fire
Dillinger Escape Plan
Necrophagist
Soilent Green
Human Remains
Dying Fetus

Stuff they use to have signed that kicked ass
Incantation
Luddite Clone
Converge

Relapse by far

etc...

Oh yeah Demiurge is a faggot.