Narrow or comfort saddle? I have just purchased an e-bike that came with a wide &quot;comfort saddle&quot;. I am used to riding a hybrid with a narrow saddle, and that seat was very comfortable on long trips. Should I replace my comfort saddle with a narrow saddle, or stay with the original?
You should ride whatever you find comfortable.  If the old saddle was good, swap it to the new bike.
If you intend on riding both bikes, keep eyes open for a second saddle of the same brand/model.  You can store or sell the original saddle.
Saddles are a personal thing, noone can tell you what will be comfortable.  Since you call the narrow saddle comfortable, go with it.
And if you don't like it on the ebike, swap back with no harm done.