The caneberry types you mention are not typically sheared, but are selectively pruned one cut at a time. Rasp and blackcaps should be easy to cut through with any basic hand pruner; some erect blackberry types are a tougher cut. All I can say is, my dull 20-year old smallish hand pruner works just fine, if you use a circular motion around the larger canes, scoring or cutting through the outer cane layer by pinching the cane with the tool and rotating the cane or the tool around the cane circumference, they cut through quite easily. It would take brute force or a more advanced sharp tool to cut straight through in one squeeze--many such tools are common.

I use bypass, as I have trees I prune too. i have loppers also. And a hand saw. And about 3 chain saws! :)

Mine are like Felco, but cheaper. I forgot the brand name? I sharpen them all the time. I like them a lot. If I need another set I would spend the money and buy a better brand. I like ARS because the blades are made well. Harder, better tempered steel than Felco blades too,