It's the cartridge...but they're very similar apart from that, and the crankshaft and the 2010-up having dual vvt rather than single. Solid & dependable for 400k+Kuato-Just curious,, does your 2015 4Runner use a spin on canister filter or a cartridge insert? My 4Runner is a 2008. I've been using the Mobil 1 extended performance filter but I'm considering switching to either the Fram Ultra Synthetic or the Purolator Boss. Not sure about the Fram because I watched a video where the guy cut it open and the can had a bunch of rust inside of it...On the other hand the Purolator Boss looked pretty impressive and well built....so did the Fram with the exception of the rust.
I'd have nonissue using the Ultra, even with a little surface rust. The Boss is a good filter but I have steered away from Purolator since they started having issues about 5-10 years ago. Don't rule out a Wix filter either, not many issues reported there.
Using the Ultra on our other two vehicles.