Well, they are at least similar enough to the real thing that the body would say "this shit again!" for the real virus. My guess is that they have different sta

Well, they are at least similar enough to the real thing that the body would say "this shit again!" for the real virus. My guess is that they have different start/stop sequences (that shouldn't matter for the protein the mRNA is encoding) and different stabilizers to help the mRNA survive.