The first one is
alkane
Then it contains silicon and oxygen.
Followed by polymers.
This polymer is organic.
polyorganosiloxane
First, alkanes.
Then it contains silicon and oxygen.
So this thing is organic matter
Finally, the polymerization product is what we see.
What is the difference here?
The difference lies in the definition:
If inorganic small molecules can be polymerized into organic substances, then organopolysiloxane and polysiloxane refer to the same kind of substances.
On the contrary, they may mean two things.