With English tech,
Boulder 6b to 6c and boulder 6c to 7a are massive, sparking off discuassion about old Ben Moon quotes,
Malc's board and the school etc.
But if you think about route 6b - to route 6c, or even route 6c to route 7a - i.e. what would it get if it was on a route, then
going by the couple of soft morpho misgraded exceptions to the rule, that I've climbed by accident then 6c doesn't necessarily feel harder than 6b, and 7a not necessarily harder than 6c. It's just that the holds are much smaller. At the end of the day, it's just about moving your body upwards. And when you try to onsight the route (as we all do of course) then it'd feel desperate. I'd wager most people on the forum would fall off or scuttle about looking for more gear. But since it's right by the ground you can throw laps on the damn thing while your skin lasts, session flash it when you're fresh, or warm up and warm down on it.
Yes I know a BMC research symposium or something decreed that technical grades should be the same for routes
as for boulders but on the rock that's a load of cock and you know it.