I have had and still do have a mix of Shimano and Hope on my bikes.
Shimano are very bitey, and so at low speed when testing they feel like they have more power*, but out on the trail I find that biteyness is annoying, and then once you’re actually into trying to slow down the power is about the same as any other brake, the limit becomes you tyre traction and not the brake.
The Hopes (M4s and X2s) have masses more feel, but nowhere near the same initial bite. I prefer them on my XC bikes for that reason alone, but they’re fine on bigger bikes too, the power is there when you need it, but it comes on as you need it rather than ‘whack’ like the Shimanos.
I’ve actually dopped down to using 160 and 140mm rotors on my bikes with Shimano brakes as it calms them down a bit at lower speed, and they still have enough power that it’s not been a problem at higher speeds in the UK. (Alps might be different for heat reasons)
The massive benefit of the Shimanos is that they’re half the price 🙂
I’ve only ever bought a couple of sets of Hopes brand new for that very reason, despite having owned and used Hopes since the very first Cable actuated ones, where as Shimano I always buy new, as 2nd hand ones are almost invariably half dead already, and if I have a failure on a new pair at least I have comeback.
*this is mostly evident when people do the car park test on their mates new brakes and go ‘wow!’, but then once actually out using them it’s a bit different.