Re: Picking a sax
I've been playing brass for decades, saxophone for less than a year. Looking for a horn for life, between those two horns, I'd go with the Yamaha.
The Selmer is a Taiwanese-made Selmer, not French-made. Many instrument makers are stenciling Taiwanese horns these days and they're decent horns. I play an Eastman alto sax and it's an excellent instrument.
Yamaha instruments are made by Yamaha. I've played Yamaha brass and a few Yamaha nylon string guitars. They have some of the best product development and quality control in the industry that has led to an impeccable reputation for quality across their entire product line.
Maybe someone with more experinece on Yamaha horns can chime in but my choice for a lifetime horn would be the Yamaha.