But this nail clipper leaves a rough edge and not a clean clip.

They leave nails with rough, jagged edges.

Left nails with a rough edge

When you use these clippers, they will leave rough edges to your nails.

So hart to control for getting a smooth edge

The nail file is even worse: use it slightly and it gets the nail a rougher edge...

The old design had an excellent file with deep serrations and sharp edges.

Stiff in cutting and gives a very rough edge on the nail

And when I pushed it harder and harder it clipped two nails and left rough edges and BROKE in the middle of clipping my third nail

even then they barely cut and they also leave very rough edges on my fingernails.

The cutting edges could be a lot sharper.

They cut very well and leave a clean nail edge.