Well, here are a few thoughts from my perspective:
Mainly, it's the Wild Wild West out there. Search for "H16 LED Fog Lights" on Amazon, and you'll find dozens of options, with prices starting around $15. Yep -- fifteen bucks. Good luck with that. And while plenty don't have any "lumens" specifications, you can find others that range from soup to nuts. 8,000 lumens for thirty bucks? Yeah, good luck with that. If you're willing to get under your vehicle and plug in whatever you might buy several times, why not go ahead and try some of the cheap things and see what happens?
However, while a lot of these have generally good reviews, most have plenty of bad reviews, too. What really got me was how many of them had reviews saying "these just aren't brighter than the original halogen bulbs." Well, we don't want anything like that, do we?
So, first of all, I wasn't even aware that were such things as "OEM LED fog lights." And I went ahead with the Sylvania ZEVO bulbs because I had personal (and very positive) experience with the ZEVO bulbs. I got mine for $129.99 on Amazon, and I figured it was worth a hundred bucks or so extra to get something I knew was good and bright, rather than taking a chance on whatever I might find on the cheap side on Amazon.
My previous experience with the ZEVO bulbs was on my trade-in, a 2015 Corolla, which had a setup similar to the RAV4: LED headlights with yellow, halogen H16 fog lights. Previously, I had a 2008 Camry, in which the fog bulbs were the same as the headlight low beams -- those were quite good. I had been using aftermarket "white" bulbs for years, and I had replaced all of the OEM bulbs with whatever I was using back then. But I sure wasn't satisfied with the H16 bulbs in the Corolla. I just found the ZEVO bulbs at a local auto supply store, and they turned out to be very good, if a bit on the spendy side.
So, that's my story, for what it's worth. The cheapo bulbs on Amazon might be just fine, or maybe some are good and some are not so good, but it sure looked like it would be difficult to figure out if any bulbs were either brighter or more reliable than any of the others. I expect that all of these bulbs are "more than just bulbs" -- again, the ZEVO bulbs have "ballasts" or something -- I presume they are not actual "ballasts" as such, but something has to convert the car's electric output to LED specifications, so the bulbs are attached to wires that are attached to little rectangular boxes that have some electronics in them, which are attached to wires that you actually plug into the car. They are "plug and play" in that you don't have to do any kind of "wiring" on your car to get them to work, but you do have to think in terms of what to do with those "little rectangular boxes," as opposed to just letting them bounce around as you drive along. As I mentioned, my installer fastened them to the car snugly with some zip ties. I rather expect that stories about "these only lasted a month" or "I have to replace these every year" might have plenty to do with the "little rectangular boxes" not getting fastened in place somehow.
The Amazon listing for the ZEVO bulbs doesn't have a good picture of this, but check out this listing for the Philips X-treme Ultinon bulbs:
That's basically what I'm talking about. This listing has a picture that shows right off the bat the "little rectangular boxes," which I suppose you could say are roughly the same size as the actual bulbs, that you have to deal with. I expect that any LED bulbs you might buy would look somewhat like the pictures on this listing.
The only reservation I might have with the OEM LED bulbs would be if Toyota might be really conservative with the brightness -- "we don't want to blind anyone here." But, with either no lumens specifications or wild claims for the lumens brightness, I don't know how you could know for sure how bright any given set of bulbs might be, short of installing them and seeing what happens. But, for what it's worth, I hope this helps!