eqT -is:exact

This function decides equality of terms with thunks.
Type equality
Type equality comparing both visible and invisible arguments, expanding synonyms and respecting multiplicities.
Compare types with respect to a (presumably) non-empty RnEnv2.
Type equality on lists of types, looking through type synonyms
A synonym for triangle, provided for backwards compatibility.
Type equality on source types. Does not look through newtypes, PredTypes or type families, but it does look through type synonyms. This first checks that the kinds of the types are equal and then checks whether the types are equal, ignoring casts and coercions. (The kind check is a recursive call, but since all kinds have type Type, there is no need to check the types of kinds.) See also Note [Non-trivial definitional equality] in GHC.Core.TyCo.Rep.
Compare types with respect to a (presumably) non-empty RnEnv2.
Type equality on lists of types, looking through type synonyms but not newtypes.