I certainly noticed the difference between a Hotpotz II and a Mccon-o-pot (https://mcconowah.com/mcconopot-potentiometer). The sweep is better than the standard Dunlop pot, and they are relatively cheap. I picked one up when I built a Weener Wah last year and it's been pretty excellent.
I would avoid the cheaper alternatives, as quality is really important with Wah pots. They take a lot of abuse!
I would avoid the cheaper alternatives, as quality is really important with Wah pots. They take a lot of abuse!