I briefly had a mauriat 86UL, purchased from new. it sounded ok, but the build quality was terrible. In less then a year keys started rattling, pads leaking, it's action becoming noisy and clunky, springs and screws rusty, cork and felt cushions falling off. I got rid of it as a trade in for a TJ sig cus RAW, great sound, great build quality and going great 2 years on having been well gigged and nothing needing doing to it - Yamaha build quality..
I believe Steven Howard has reviewed both horns on his web page - worth reading and drawing your own conclusions.