I really need more pics from both years to make a better guess.
Just based on these two pics, my best guess is these are different bucks. There's a fair chance they are the same buck, particularly if this buck was 1 1/2 last year and 2 1/2 this year, since going from 1 1/2 to 2 1/2 is the 1 year change when it's hardest to identify a same buck.
Do you have any side-view pics of these bucks from last year and this year?