BIke fodder

A straightforward question. I have had a +def -spd B.Ike for quite some time and recently I got a +spd -res one.

The question is that I'm not entirely sure about which one to fodder off. I have found that he doesn't really need speed, due to his role as a physical dmg bait and more procs from steady breath and his increased def only further improves that, but on the other hand +spd -res is pretty much the ideal IV set recommended on this site.

Do you guys have any experience with the +spd variant? I'm actually quite unsure about which one to keep and which one to fodder for steady breath to one of my dragons.