Ferrari 360 rear brake pads

Your suspicions are correct. The Ferrari part clearly indicates that the friction material is Galfer 3321, while the parts you were given seem to use Ferodo HP1000.

"Fit" and "correct" are two different things. Different pad materials have different friction, temperature, dust, noise, etc characteristics (note that aftermarket suppliers have multiple pad compounds available for different uses; they all "fit" but will be better or worse for given usage). Friction material selection/tuning for a production car balances a slew of such characteristics; it would appear that Maserati made a different tradeoff for the front of their car than Ferrari made for the rear of theirs.

It's not (likely) unsafe, but it's not right given what I bet you paid...

 

You probably won't notice any difference.

 

I'd be inclined to agree also. Almost certainly a reasonable substitute to make.

 

+ 1

Its rear brakes so they do less of the work anyway

It looks like the Maser version cost more than three times as much too !!

 

I would think subcontractors personally.

Dude if you knew the kind of **** pads I've tried on the 360 rotors and the cars just stop fine. I even tried $20 semi-metallic pads from rockauto.com! Only problem was the pad was too thick and I had to grind them down. Ultimately I switched to girodisc pads that worked better front and rear.

It'll stop fine and like the guys said you'll probably never even notice if they indeed are different. Good to know about the parts equivalence...

 

You are, of course, free to make your own choice.
I only speak of how we do it at the car manufacturer where I'm a brake engineer.

It is entirely expected that both companies are supplying friction material to Brembo. We have Brembo as a "Tier 1" supplier. That means they sell parts to us. In this case, Ferodo and Galfer (ITT) are "Tier 2" suppliers, meaning, obviously, that they sell to Brembo, but Ferrari/Maserati do not buy from them directly. Brembo will ship the car manufacturer different parts with different part numbers because they're designed to different requirements. This is very common; we get involved in specific friction material selection and often work with the finished pad supplier as well as the friction supplier. The Tier 1's might prefer to keep all of the profit for themselves, and only sell pads with their material, but have to concede to the tradeoffs and demands of their customer so it is not at all uncommon for companies that can make and supply the complete assembly, and are competitors, to have to work together to produce the part the OEM wants to put on their car.

It is not likely that they're both the same spec. Why? First, the fact that the friction material is actually listed on the package! You won't know what compound is on your brakes for most cars. Also likely different because different OEMs, not to mention significantly different market uses, drive different compound selections. Where I work, we have numerous models with different pad compounds based on market (US, EU, China, etc) or intended performance level of a particular model (number of cylinders, suspension upgrade package, etc).

Here's a page from Ferodo that shows how differing pad materials present different tradeoffs: Ferodo Racing (Note this is competition compound, so no mention of dusting or noise)

For what it's worth, where I work, when there's a proposal to change friction material, either as a production change or for the service arm, we get a dyno datasheet with 40+ plots like this one Ferodo Racing to determine if the proposed substitute will be transparent to performance, or require vehicle-based evaluation. At the same time, other people are evaluating for dust, noises, feel.

There's a lot of thinking and testing that goes into making the brake pads from the factory do the best job of meeting the manufacturer's requirements.

They're both "high performance" compounds, I have little doubt you'll be quite content with the cheaper pads.
FWIW, I did come up with one online reference indicating to expect lots of dust from the Ferodo compound. I see that the Galfer was used on the 550 and 360.