Which size looks better?

First one is with a medium and the second one is a large. Measured chest is a 39 and I’m 5’9” for reference and Salomon size chart says medium. Both felt good but the large I had to tighten it up a little bit. The models that REI only had was the ADV Skin 12 so I was just there trying them out but definitely not the model I was going for. I’m looking at the ADV Skin 5. Let me know what you guys think. Thanks in advance.