Moderna = modified experimental RNA
Contains graphene which is not a good thing to have in your body.
mRNA does not contain graphene.
While both mRNA and graphene contain cyclic rings of carbon, they are structurally quite different.
Your body is literally full of mRNA. You have it in every single cell. Without it, you would die. In addition, the mRNA in your body is not all human mRNA—you also have virus, bacteria, and fungal mRNA in your body (because a lot of microorganisms live in your body), as well as the mRNA from the food you eat.
The modification of the mRNA used in vaccines is to prevent the immune system from destroying the mRNA as soon as it is injected. Since pathogens contain mRNA and other forms of RNA, the immune system considers any RNA that is not enclosed in a cell as a threat that has to be destroyed. A vaccine needs to be present for a prolonged period of time (days) in order for the immune response to develop properly. If the mRNA in the vaccine is destroyed immediately, no immune response can occur.