DoF is determined by four factors: aperture, focal length, subject distance, and circle of confusion (linked to sensor format). With the same camera and two different lenses, if the framing is the same, the focal length and distance factors cancel each other out, and DoF is determined only by aperture (caveat - this doesn't apply for macro distances). Doesn't matter if the two lenses are the 85L and 135L or the 14L and 800L.

So, no need to bust out the calculator, if the framing is the same for the 135L and 85L, and both are at f/2, the DoF is the same. But note...the perspective is not the same.