Depends upon who made the blades.
I use Oregon & Stens which most of the time are almost identical.
OTOH I have seen a lot of cheap blades that are exactly that, cheap, a little thinner, a little narrower, a little shorter cutting length and God only knows what grade of steel they were made out of.
If there is a brand name stamped into the blade then most likely they will be OK at worst.
If no brand name then best avoided.