I’ve made the experience, that the hope mountain bike brakes (e4) feel not as strong as the trial zone, mt5 or shimano xt.
I know that the mt7 has around 8 per cent more power than the mt5, but I don’t know with which lever option (Hc3, two-finger, ...). But I think it’s cheaper to use better pads or a bigger disk.
In our local trial club some kids broke their magura levers. The hope race lever is very solid and we have no big issues with them until now. But I have to clean and grease the lever with link regularly to avoid creaking noises.
I really like magura disks, because they are thicker than disks from other manufacturers.
In Germany its actually very popular among mountainbikers to combine the magura calipers with levers from shimano or formula. And if you don’t care about money, you can use a trickstuff lever. That combination is the strongest brake you could actually have (keyword: shigura, trigura).