I have road BB7s on a RoadRat with road levers and they’re excellent, loads of power and enough feel not to lock things up inadvertently. Also ridden a Cotic X with Lyras – same Sora levers btw – and by comparison the Tektros felt really feeble, to the point where I think the brakes on my road bike, Campag Chorus, are significantly better. Not only do the Lyras lack initial bite, pulling on the lever doesn’t actually seem to increase stopping power at all. The BB7s are also a lot easier to adjust.
So basically, if you’re asking if the BB7s are better than Lyras, in my experience, yes, they’re massively better. I guess you could argue that feeble brakes are in keeping with the cross bike ethos and I wonder if different, softer pads might help, but I’m pretty underwhelmed with the Lyras to be honest.