Both routes are very beautiful, they are different and they don't cross each other. Whichever route you choose, you'll get it right.
The basic differences are:
At Cala en Porter You visit four caves, including the famous Cueva de la Luz and, if the sea allows it, you can jump from some rocks into a natural pool. Then you stop at Cales Coves, where you can snorkel, swim or rest.
Booking for Cala en Porter here
Es Canutellsis the route with the most caves on the island. You will visit between 7 and 8 caves. In one of them the instructor goes with a torch because it is very deep and totally dark, you will love it! To snorkel, you don't stop in a cove as such, but on stone platforms between the water, if the sea allows it, or in the water. in a little corner of the white sandy cliff bottom where nor on foot. On this route you paddle for about 15 minutes more.
Book Es Canutells here
Therefore, we could say that both have their magic points and that the one in Cala en Porter is a little more relaxed y Es Canutells a little more adventure.
The choice is up to you - you won't fail!