We discuss the differences in tone and build between the brass body Yanagisawa Saxophones and the bronze body models. For the full range of Yanagisawa Saxophones for sale check out: https://www.dawkes.co.uk/woodwind-instruments/saxophone&tagvalue=yanagisawa
For reference, the brass body models all have a 1 in the Yanagisawa numbering. For example AWO1 and AWO10 (these used to be the A901 and A991 respectively). The bronze body models have a 2 in the numbering; AWO2 and AWO20 (A902/A992 previously).
There's not really a better or worse, it's really down to your own preferences based on the type of sound you are trying to produce and the resonance you like to feel.