Purchase advice: New or brought; EU vehicle or not?

Hi! In general, I am currently fluctuating – after all, I have reduced my selection to 2 brands and models – between a purchase of a Seat Leon and an Audi A3. For price reasons, however, the thing seems to develop clearly in favour of the Seat. Actually, I wanted a used car (max. 2 years old, max. 30,000km), but I get the corresponding new car cheaper which just irritates me. I decided for the Leon FR with 2.0 TDI DSG with 184 P S and full equipment. I get it by using Restart (dealer nearby) brand new for 28750 EUR. See appendix. At a dealer on mobile.de I get it as EU vehicle even for only 25300 EUR. See: http://suchen.mobile.de/…/212157042.html?… Questions: 1. Why not get it used for the price or even cheaper? Is this normal with Seat or am I looking wrong? 2. Are there essential features that are missing with the EU vehicle or other disadvantages? Thank you.