I hope this is OK to post. I'm not sure about unsolicited C&C these days.
I like the basic poses equally, but I see some things in the first that are hard to let go of.
When you posted him before I remember some hair standing up and it's there again. When you see the 'tousled hair' look in a model shoot I suspect it's Very Carefully Controlled tousle you see. A bit of organization would help. Maybe comb and then lightly tousle? Ask a stylist! He's snappy-looking so the hair is important. Also tiny details like the collar overhanging the jacket stand out. Yes, that first building is a bit strong, but also the DOF doesn't get his left arm. Maybe a longer lens would have been more forgiving on those items. And the drooping hands vertically stacked become prominent. I know, hand posing is a whole subject of its own.
The second (again, IMO) just needs the left edge cropped. To me, the buildings in the main BG are OK but the construction cranes are distracting, like you let the camera wander off the set. The reflection on the water and the dock elements over there also detract. I think he still has space in front of him without that strip, especially since he isn't looking that way. Good pose, exposure looks really good to me, all of him is in focus, and I like the sky!
I like the trombone. It's prominent, bright and shiny, maybe a bit too much so.. but I still like it.
There's a lot to like about both (exposure looks really good, clothes suit him well, good posture) but when I look closely the 2nd is technically better to me. However, I like the face from the first one better. Better color and general vitality, and looking at (or almost at) the camera.