That’s a pretty crazy observation. I wonder why that is? I use a mixture of both—I always do DB’s as my secondaries after bench / OHP.I don't even do direct trap work, and they are huge. I wish my arms grew like that.
When I do side laterals, I go slightly above PARALLEL however, which brings in the traps.
I do throw in a shrug at the top when warming up on deadlift.
Now, yes, genetics... but here is a caveat.
I recommend using dumbbells more for exercises.
I work in a prison(go figure lol), and the inmates in Level 4 have a small weight pit with dumbbells ONLY.
The level 2 guys have a full weight pit with gym equipment and barbells.
The level 4 guys, even the skinny guys, have immense trap development. Everyone that hits the level 4 weight pit with only dumbbells, has traps, EVERYONE! No matter genetics, trap city.
Their trap development is huge compared to the Level 2 guys that don't use the dumbbells as much.
since writing this thread, I’ve actually seen some growth in my traps by incorporating some of the snatch grip stuff (I love it now for upper back).
Those DB’s are real interesting tho.

