Taxes yes - in addition to occasionally checking tax calculators I know what our after-tax income is in both places.

Commodities - not in a rigorous fashion. I know we have more at the end of the month. If it's because we just buy less stuff that's OK with me. As I mentioned, we save a lot just not having to own or operate a car; we walk or cycle most places. Health insurance is also far, far less expensive (about 2500 EUR per year for a family of three), and even if that was "included" in my pay in the US, somebody was paying for it.