I'm currently training in both olympic weightlifting and IP-influenced aikido(*). My sense so far is that the two take different approaches in search of different goals. I'm not yet knowledgeable enough in either to be much more precise than that, I'm afraid.
I will say, though, that your relationship to gravity is very different when your goal is to put an attacker on the ground than when your goal is to put a heavy weight over your head. Channeling the energy that an attacker helpfully provides is also very different than supplying all of the energy necessary to move a barbell from a dead stop. These guys
clearly know something about explosiveness and structure -- that's double bodyweight they're lifting -- but I'm not sure it's the same stuff IP martial arts study.
My feeling is that both have important lessons to teach -- which is why I'm doing both -- but that they aren't the *same* lessons.
(*) IP-influenced aikido = aikido in the dojo of one of the folks who is trying to incorporate IP into his art. Not going to get into the whole debate about what is and isn't IP, or who does or doesn't "get it."