Iggy did outscore LeBoner 22-16 once in the five playoff games that they have met, but the Miami Morons won that game anyway, and LBJ more than doubled Iggy's scoring during the series. (For the five games, LBJ outrebounded AI; and Iggy had a small edge in assists & steals.)
https://www.basketball-reference.com/play-index/h2h_finder.cgi?request=1&p1=iguodan01&p2=jamesle01
None of these head-to-head matchups really make Iguodala any more compelling for me. We just got through with an albatross max contract for a defense-oriented player. While Iggy is a better scorer than AK-47, he's not worth mid eight figures, even though he can lock down.
For wing defense, the best model is to pay the mid level or less for a no-holds-barred stopper, such as Bruce Bowen or Raja Bell (five years ago, anyway; not now <<banging head>>), who can hopefully score some points.
Or maybe an aging Andrei (within the same sub-MLE salary range).
And/or bring back Ronnie Price for the primary purpose of being a defensive gadfly (just like Hoffa and Fesenko should have been used, for starters), an in-practice tough guy (as if they're gonna have many of those this year), and a last-resort PG.
Or just enforce defense among the players you've got.