In terms of bang-for-the-buck, the FZ-5 is a solid choice if you're ok with "decent" sounds as GuitarStv said.
It's essentially a fuzz-centric multi-effects unit in a compact package, but the models it contains are limited. You give up some character by going digital (fuzz is one of the hardest sounds to accurately replicate digitally from what I understand, despite the circuits being relatively simple), but you do get a handful of genuinely usable sounds in a road-worthy form factor for about $90 or so used or $120 new.
The FZ-1w, on the other hand, is a dynamic, pro-level fuzz that has very versatile vintage and modern modes and will undoubtedly become a classic in the Boss lineup moving forward. Whether it's worth an extra $50 over an FZ-5 is completely user-dependent. For me, having gone through a lot of fuzzes, it would be, but that's certainly not the case for everyone.