I use OEM since, as others stated, they conform better to the glass. I had the same issue on our previous van which was a Ford, so it's not specifically a Toyota issue.
I get "Denso" brand from Rock Auto, which is OEM. (The difference between Denso vs. the one from the dealer is the Denso unit comes in a blue box that says "Denso" and the dealer unit comes in a red box that says "Toyota".) For the fronts, get the "hybrid" ones to match OEM.
I was told years ago that Toyota quit selling the inserts but maybe they've reversed that. It'd be nice to save a couple of bucks. I would just pop off the blade and do the inserts that way instead of fiddling with it on the van, though. To each his/her own.