Does the security certification of a lock relates to both bolts?
For locks, you have ANSI grades 3-1.  3 being the weakest and 1 being the strongest.  Typically, if you buy them as a set both lock cylinders will have the same grade.  But the cylinder is only one part of the security.  A higher grade cylinder will resist picking and drilling but have no bearing on resisting blunt force to the door.  Blunt force is typically the easiest way to open a locked door.

This is where latches and bolts greatly differ.  The door latch will not resist someone kicking in the door.  A deadbolt has a chance if the door, strike plate and jam are up to the challenge.  If you have a metal clad door, an ANSI class 1 strike plate (properly installed with long screws that go into the door framing) and a reinforced door jam it will take a battering ram to open the door.