The thing about ratings is that you have to consider context. I am giving you example of top notch manufacturers. Personally, I would never buy Duralast etc. Now, when you talk about TMD (Textar), ATE, Hawk, Brembo, Akebono, etc. those are top tier manufacturers.
GG rated Akebono are designed with one thing in mind: delivering brake performance at relatively high temperatures. However, you did not pay for your Akebono's $612 like that BMW has on (probably ATE). Reason is that BMW M needs very high torque pad that delivers much more brake force immediately. Compound used in Akebono Pro ACT etc. cannot deliver that. Plus, average driver of Altima, Sienna etc. does not want wheels to look like they have been in coal mine.
The compound used in these FF rated pads (let's talk regular pads like on my BMW) offers much more torque than anything Akebono GG (I had them on VW CC). That allows me to use brake less, allows more force to be utilized in less time, hence keeping temperatures low. Allows better feel and adjustment etc. unlike Akebono that are compared to Textar, ATE, Pagid very soft and require more travel etc.
So GG rated Akebono ProAct or whatever will deliver decent force at low and high temperatures. FF rated pads (I am talking top tier manufacturers, which Akebono is) will deliver more force, will allow more adjustment, etc. They will maybe be less capable at 800f than at 200, but they will still deliver a lot of force. But more importantly, bcs of force, I might not at all get to 800f, hence I will strain pads less, rotors, fluid.
Now, take this into consideration. Akebono makes for Toyota GG rated ceramic pads for Sienna, for Lexus with F-Sport packages, IS F models, it makes FF rated pads.
So, chasing performance based on ratings is really wrong way of doing it.