I have to disagree with the "roughly equivalent" statement. Its missing core functionality relative to PostGIS. For example, the Geography type and associated operators (which is functionally distinct from Geometry) is completely absent.
I feel this is misleading. You can use various spatial operators which are functional on geographic CRSs. For the type of situation you would usually use this for, it handles geographic just fine. But agreed it isn't explicit like in postgis
Any info on performance differences?