If you don't mind the smaller space, I would say M3, the interior is just so nice compare to civic.

For price comparison, do take note of the discounts. pre-facelift 2016 manufactured m3 I got offered total 9k discount. The new M3 no discount at all. Civic got 5k discount.

If you compare the top spec, it would be 129k for m3 and 130k for civic tc-p after discount.