There are several minor differences between spikes because of different manufacturers. This spike looks fine to me. If you are talking about the "rolled edge" where the top of the spike meets the bottom section, that's okay. I have a few spikes like that myself.
There are some other rough items on this helmet; broken spine, split visor trim, missing liner, missing visor brads, etc. Overall it looks good to me, but I wouldn't invest too much.