Just because one Dev is slower than the other doesn't mean the other person is slacking. DPC has his own ways of working and L&P has his own. The pace of rendering also depends on the angles and characters and other details taken into each render.
L&P is slow but the cause for it is his restraining work style not being extremely lazy, and he is not changing it which is the worst part about him. A second major cause can be the fact that he gets lost in the details a lot. I understand that because I more less want my things to look perfect too. If I write an entire page but it ends up having a scratch or a spot, I would rather write the whole thing again or do my best to get rid of the spot. I wouldn't care about the time that is going into it. The fact that he adds fashion labels ( mentioned by
Alley_Cat ) also takes time. A lot of little things that go unnoticed in his renders actually take time.
Also he is not bound under a contract to deliver at a specific time. He wanted freedom in his work and he gets it here. No boss, no supervisor, he works as he likes. From our perspective not good at all but the fact that no one monitors him can easily lead to him putting in a lot of time in a single render or scene etc.