Salvador Sanchez vs Arguello for the Jr. Lightweight title in 1980. Who would have won?

I think,around that time, Arguello was getting ready to make his challenge for the lightweight belt,and Sanchez had just beaten Danny Lopez, and won the featherweight belt.I think, being more adjusted to the weight, Arguello would probably decision Sanchez over 15, with a late round stoppage possible, being this is Arguello's best weight.