Belgium and France are two of the countries people most often shortlist together when moving to the EU. Below is an honest side-by-side on the things that shape daily life, with the stronger country marked on each row. On these measures Belgium comes out ahead on 4, France on 2.
Rent is the clearest split: a one-bed runs about EUR 950 a month in Belgium against EUR 1,000 in France, so Belgium saves you roughly EUR 50 every month.
Typical net pay is EUR 2,300 a month in Belgium and EUR 2,200 in France, putting Belgium EUR 100 ahead before anything else is counted.
What actually matters is the money left after rent: EUR 1,350 in Belgium against EUR 1,200 in France, which is where Belgium pulls ahead.
You will get further on English alone in Belgium than in France, which matters most in the first year, before the local language clicks.