Besides that their appearance is completely different, the differences between Magic Mushrooms and Magic Truffles is very small.
Both contain psychoactive components as the psilocin and psilocybin. There are no studies that examined difference in the psilocybin in Shrooms and the psilocybin in Truffles.
The main difference is that the Psilocybe Cubensis (magic mushrooms) mycelium develops underground and later is when the magic starts producing mushrooms above the ground.
The magic truffles (Psilocybe Tampanensis) on the other hand grows like Cubensis but is also capable of producing truffles underground. The magic truffles are like mushrooms above ground, are very dense and concentrated mycelia. The mycelium begins to form truffles through small wires that go mycelium forming a hard and durable knot. Truffles developed resist so that bad conditions.
When the weather improves, the magic truffle begins to grow again and continues to create threads of mycelium finally create magic mushrooms on earth. Not all mushrooms have the ability to build truffles, tampanensis alone can.
Although in theory the truffles and mushrooms should have the same effect, you will find that people have a different opinions. Some people says that Truffles are less visual than Shrooms but yet again, others contradict that. Some people find that the experience you get with Truflles is easier to experience than with Shrooms and viceversa.
Everyone enjoy the experience in a different way. The effects of psilocybin varies depending on the person, their mental, emotional state and the environment that surrounds it in the moment of eating them.
Our own experience shows there is no difference. We have had wonderful experiences with Magic Mushrooms as well as Magic Truffles. They both gave the same effects: Visual, as well as spiritual.