Kyle, One of the advantages to manufacturers of using the Delco pancake compressor is that it can be mounted in any position...
The York can only be mounted in two positions...
The MB AC manual for our cars shows how to make a bent DIPSTICK for measureing that sump oil... it is a rod with markings on both ends... one end for horizontal mounting and one upright...
It is my impression also that that York P piston is much stronger than our Delcos... whether that comes from always having the oil available from the sump I don't know... but certainly with anyone using other than R12 the oil movement is suspect for the Delco.
The disadvantage is that they are much rougher due to the weight and movement of those two pistons together rather than four smaller pistons with the movement spread out over the full rotation. It is also my impression that the York takes more HP to run...