We have written a lot stuff on the emergent phenomena and various cultures in physics, including the difference between the relativistic and particle-physics cultures.
But when I looked at Clifford Johnson's blog an hour ago or so, I saw his comments about an interesting article by Steven Weinberg in the CERN Courier:
There are many ways in which high-energy and condensed-matter theorists use similar methods and tools that are often helpful in the other discipline. The two cultures overlap and flows of ideas are sometimes helpful. But as Weinberg correctly says, there is a huge gap between the goals, aims, values, motivation, and sources of satisfaction in between the two cultures.
As Weinberg correctly says, condensed matter theorists are driven by the weird phenomena themselves; by their applications in the everyday life; and by the emergence of new phenomena that can be created by old players. On the other hand, high-energy theorists are motivated by the desire to explain new phenomena away; by purely theoretical desires to simplify the world and understand it accurately with a few assumptions; and by reductionism in general.