here's a little quiz for folks.

which team typically scores more runs:

team A: .280 / .330 / .400
team B: .245 / .330 / .400

Same ops.

Team A? Team B? the same?

there's studies on this.

the team with more extra base hits, which is team B. 

This is why ISO is such a useful "simple" stat (just SLG - AVG).