Job #1's offer was based on a 40-hour work week. I am now informed that staff often work a few hours extra overtime each week, and are compensated extra for it. The written offer does lay out an overtime rate, but what I didn't know was how overtime was treated in the company culture -- do overtime hours flow freely, or does the company bend over backwards to avoid paying OT except for special projects? I am told it is more like the former.
To me, that's a big plus. I can pull off, say, 3-5 hours a week of overtime with no life-quality impact. That potentially brings the Job #1 compensation up to around what my counteroffer was -- maybe a little higher.