No question, the hand-stitched rasps are in a league of their own.
That said, there is a relatively new item on the market called the' Iwasaki carving file', which is kind of unique and also very effective. These tools cut [like a plane], rather than tear the wood, leaving a surprisingly smooth finish. They are milled, acid-etched tools, with an incredible bite. I've got a set [flat and half round, fine cut] on the bench now. The half round is a dream to use, the flat requires more of a 'learning curve' [more tooth in contact with the material, I guess], but once the 'touch' is acquired, the shavings fly. I can't imagine what the course cut would do.
Well made, competitively priced.