Difference in sizes/thickness of lettering in S. Vietnam Prov. Rev. Govt. 1 Xu

These South Vietnamese Provisional Revolutionary Govt. 1 Xu's appear to have different thicknesses in their obverse lettering. This is apparent to me in the “G” in “NGAN." The left coin's G appears to be slightly thinner than the right coin's G.

Is this something of note or am I seeing things?

I think the differences are die wear and possibly a partially filled die.