which one should i take in first term first?

doesnt matter.they still go over the full content regardless of which course you took first.

econ 1b03.

Holmes explains the demand-supply diagrams in way more detail and goes over the fundamentals. 1BB3 goes into further application of the d-s diagrams.

i felt econ 1b03 did a better job of easing me into the study of economics. never took an econ course b4 in my life, btw...