IE University x Warwick University for business

I know most people here won't know anything about colleges in Europe, however, if anyone AT ALL have the info I am looking for, please share! So, I'm an international student from LATAM and I applied to colleges in the US and Europe. If I don't get lucky this week with the schools I'm still waiting for responses (NYU, USC, Umich, Berkeley), my decision will be between the ones in the title. I believe I will have a better student life at IE, and both unis have similar prices, so what would make me choose warwick over IE is if it is better and more prestigious in business than the latter. Does anyone know if that is true to an extent that will actually make a difference later?

I know prestige isn't everything, but if I were to ask you if I should choose between Harvard and a no-name uni u would say Harvard... Does the same situation happen here (even if not as extreme)?