This all seems very strange, I am sure you all work very hard, but for 2 people to do the work of 4 people in half the time???
Different standards maybe, maybe the 4 man teams always get difficult installs to do?
Maybe the 4 man teams are in each others way, could that be it?
Generally though, in any manual job, those that take their time and are conscientious, their work is to a higher standard.
Also having the right tools for the job helps, and being organised and prepared with the right materials can speed a job up.
My other half always say's "take your time and do the job properly".....:rolleyes2: