New Domane AL4 Gen 4 or used 2022 SL5 Gen 3

Hey everybody. I’m looking to get into a road bike. Coming from a hybrid Trek Dual Sport 2

I want to know if I should buy a brand new Domane AL 4 Gen 4 for $1600 or a used SL5 Gen 3 for $1600

Does the carbon frame really make that much of a difference for someone who plans to casually ride and do occasional group rides? Would prefer a new bike instead of used, but if SL5 makes a world of difference, I’d rather get the SL. Thanks in advance!