I have a question about EUA, lets say I purchased X fare ticket one day, then the next day someone with the same status as I do purchases another X fare ticket (so we both have the same fare type ticket and have the same status) when EUA runs, will EUA process me first over someone who purchased their ticket at a later date?

For example there's 3 plats traveling on the same fare type, but only 2 seats open up front. At the 5-6 day window, will EUA determine it by who booked their tickets first?