I got a feeling.
Pirates opens on Memorial Day weekend and will easily go close to 125+, but Spidey is opening on a regular weekend (unless you count Cinqo De Mayo?)..I dunno. It might go as high as 110 but certainly not 150 or anything like that.
Spidey is going be seen like the opening day for the summer movie season. It well make $150M, largly due to lack of competition. I don't know anyone who dosn't want to see it.