I have BB7s on my 7.9FX fork and on my 94 stumpy shopping bike. And while mechanicals are an improvement over rim brakes, the shimano hydraulics on my orbea diem are simply on another level. If you are running a flat bar and can afford hydraulics I would not give mechanicals a glance. And BTW would sram and shimano stop teasing us and release their fracking brifter hydraulics already!