Flagship to Gnu Gremlin sizing

Need some quick sizing advice. Expert rider and been riding a Jones flagship 161w (263mm waist width) with my size 12 boots. I'm 6'1", 215#.

Trying to decide between a gremlin in 155 (264mm waist) or 159 (270mm waist). Leaning towards 155 for a more nimble board. Any thoughts?

Cheers! 🥂