Pork loin steaks are a type of pork chop. They are sliced off of the pork sirloin roast.
Pork loin steaks are usually fairly lean. They can be boneless or not. If they have a bone, it is usually t-shaped.
Another type of chop, which is cut from the boneless loin eye muscle, is the pork loin butterfly chop. It is a thick chop, cut at 2 inches.
Center cut chops are also from the eye loin muscle, but they have backbone included in the chop.
Blade chops are from the loin, but they come from the blade end. They contain more than one bone type, as well as more than one muscle type.