This says different but maybe its just a medical semantics game, http://www.differencebetween.net/technology/difference-between-johnson-johnson-and-mrna-vaccines/
It does appear to be a medical semantics game, too. From your linked article, the Janssen product carries the gene sequence that codes (in the human cell) for the spike protein. All three Big Pharma companies, thus, push a genetic code segment into our cells to make spike proteins. Technically, J&J is an adenovirus/gene segment sandwich and Pfizer/Moderna are lipid mRNA sandwiches. Whew!
My breakdown: "650,000 COVID deaths" 6% of deaths purely from COVID (CDC admits this). (94% had at least 4 other life-threatening diseases) = 39,000 dead. The RT-PCR test* has a 97% false positive. Meaning, 650,000 X 3% = 19,500 cases that may have been real COVIDs. The virtual disappearance of flu, cardiovascular, liver/kidney, pneumonia, fewer cancer deaths BECAUSE they were all rolled into COVID to promote panic and compliance (and to bill vastly more $$$$ for your hospitalization). And that's how you create a "Pandemic." * To process the nasal swab test in the labs they multiply the material by 40-45 doublings (that's called "Ct"). Anything over 30-32 doublings is worthless for the diagnosis of disease (because everything goes positive). In fact, Kary Mullis, inventor of the RT-PCR test, warned scientists to never use his test for the diagnosis of disease as it was never designed to do so. Ask your lab what their Ct was for your "positive" test. They will never tell you!
True story as I know the guy, he is a firefighter and was sent to get a "test" so they "test" him and come back and tell him he is positive. He asked to see the results and the clinic person says "no, I'm not allowed to give that to you" long story short a ruckus goes on and the ff calls the police. He explains what is happening and that the guy can in fact give him the results as it is HIS personal medical files. The cop goes and talks to the clinic guy and the clinic guy says "I can't give him anything because there is nothing to give him" "I didn't even run the test we were just told to tell everyone they are positive" That is crazy but I can and do believe it