Greedy

I am replacing one of my knock sensors after getting a P0330 code. I looked up OEM knock sensors on a toyota dealerships site and they have two brands listed - matusita and nippondenso. They are both listed for the same years, motors, and models (96-02 4runner 5vz). I ordered and recieved a nippondenso but when I pulled out the falulty one tonight, it had a big "M" on it which I assume means "matusita". Anybody know if these are interchangeable? Thanks!