Looking to join the audi family, wanted opinions on a4 45 and a5 45/sportback

My lease is up in 2 months and im eyeing an audi to purchase as my next car. Ill be aiming to keep it for around 5-6 years for a daily driver. So far i really like the A5 sportback bc more room plus cool trunk but, the A4 is a few thousand cheaper lol. Looking at getting a 22/23. Just wanter to know if theres anything in particular to know. I assume theyre the same build but diffrrent body sizes so similar reliability?