Well, First of all congratulations.
Secondly, Paris and Dublin, both are great city but when comparing the pros and cons of both colleges, let's consider information on both.
1) Accreditation - Both are triple accredited
2) Ranking - In QS EDHEC is at higher rank, in FT UCD is at higher rank.
3) Cost -> EDHEC - 43000€ (2-3 year degree+Cost of living) vs UCD - 19900€ (1year degree)
4) Job Market - Well, if you get placed in Paris, nothing is better than that, but having French fluency is required. Believe it or not, you will be needing it, especially in consultancy role. also, Paris is one of the expensive city to live in so disposable income after tax or rent might be an issue(Believe me I am well versed with Countries' stats through Wikipedia now). If French and cost is not a problem, than having job in Paris is like a dream come true! Why? Because Paris is one of the leading business hub and you can enter into any niche you want.
On other hand,
Ireland is known for Consulting, IT and Pharmaceutical companies, so if you are well versed with these fields or is going to work in one, you can expect a good time in Ireland (Better ranked in World Economy And overall GDP) less expensive than Paris, ENGLISH language is widely spoken so learning another language won't be a problem.
So no such Extensive difference they both have, but if you ask my opinion, go for the city you can find job in the niche you are looking forward for a career. Because at the end, career is the thing you will be seeking. I don't know which niche you are from or where you want to work, but look for job market and ROI over rest.
And do tell which school you will end up taking.
Good luck.
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