What does it matter what other people have in their boats? The ONLY thing that counts is what YOU have in YOUR boat, which is your question, right?
Therefore, learn to identify the engine you have with a little research and homework.
You could take a picture of the front of your engine and share it with us and we could tell you.
You could go to a reputable website that shows the engines in photos, like this one:
Sailboat Engine Parts and Boat Parts- TOAD Marine Supply
The M25XP and XPB, as you've learned, are different engines. The XPB has the raw water pump on the port side underneath the alternator. The XP has the rw pump on the starboard side.
Happy learning.
In either case, bleeding is EASY. On the XP, you just turn a knob. This is not rocket science. Just so you understand, I put off bleeding my M25 for a full year when I bought the boat in 1998 because I had the fear of never being able to start it up again! Really.
But 1998 was just about pre-internet days. Now, there is no excuse.
I learned that even on my M25, all I have to do is turn a small knurled knob to bleed the engine. NO muss, no fuss.