Is there any evidence one shot of J&J protects better than one shot of Moderna/Biontech, or is the main difference that the companies chose different strategies

Is there any evidence one shot of J&J protects better than one shot of Moderna/Biontech, or is the main difference that the companies chose different strategies for their studies/marketing? (Moderna/Biontech hoping to achieve better results and 2x the doses sold, J&J hoping to be done with the studies 3-4 weeks earlier and having a marketing advantage because it only requires one shot)