Both of them are pretty great as mixers, but the “preference” for either kinda depends on what a given workflow/install really needs, and what model of mixer you’re looking at. No professional brand or model is necessarily better than another, its all about the context.
The UK made Allen & Heath mixers of “yesteryear” were superior, IMO, to anything that Pioneer was putting out but that was “then”. Pioneer mixers tend to be more “Industry Standard” and their newest models are quite good. It kinda comes down to personal preference when you’re comparing higher $$$$ models of each.
booth companies have their pros and cons. it is all about preference.
cue function on the a&h sucks.
the pioneer sound < a&h sound
4eqs? i don´t need it.
filter? a&h wins
fx? pioneer…
Im leaning towards the pioneer on my next mixer purchase because most of the people i know use them. its not that I want to conform to “industry standard,” it’s because pioneer is always available for purchase here in my area as oppose to A&H.