According to the Recording Industry Association of America (RIAA), Red Hot Chili Peppers have sold over 60 million certified albums in the United States, while Guns N' Roses have sold over 45 million certified albums. Red Hot Chili Peppers also hold the record for the most number-one singles on the Billboard Alternative Songs chart, with 14.
In terms of concert attendance, both bands have had successful tours throughout their careers. Red Hot Chili Peppers' stadium tour in 2016-2017 grossed over $175 million, and Guns N' Roses' reunion tour in 2016-2017 grossed over $285 million. However, it's worth noting that Guns N' Roses' tour featured classic members Axl Rose, Slash, and Duff McKagan, while Red Hot Chili Peppers' tour featured only one original member, Anthony Kiedis.
On social media, Red Hot Chili Peppers have a larger combined following than Guns N' Roses on platforms such as Facebook, Instagram, and Twitter. However, social media popularity can vary significantly depending on demographics, geographic locations, and cultural differences.
In terms of critical acclaim, both bands have received positive reviews for their music and live performances. Red Hot Chili Peppers have won six Grammy Awards, and Guns N' Roses have won three. Both bands have also been inducted into the Rock and Roll Hall of Fame.
Ultimately, the popularity of a band is subjective and can vary over time. Both Red Hot Chili Peppers and Guns N' Roses have had immense success in the music industry, and their popularity remains strong to this day.