2-We need to go to Piccadilly Circus.
3- We can go to Oxford Circus and change there to the Bakerloo line and the next station will be Piccadilly Circus.
4- Or we can go to Holborn, change to the Piccadilly Line and the second stop will be Piccadilly circus.
5- Let's count the stops. In my variant there are six stops.
6- And in my route there are only five and it is quicker.
7-OK, let's try your variant.