They do not do the same thing. A good treemap actually hides the tree structure. (From the link, the GrandPerspective one is good the Baobab one is useless due

They do not do the same thing. A good treemap actually hides the tree structure. (From the link, the GrandPerspective one is good the Baobab one is useless due to the borders/padding). In a tree map you can see siblings, cousins, 2'nd degree cousins of similar importance (size) next to each other and you can see smaller items because size is represented as the surface of a rectangle. On a flame graph, you can visualise the entire tree in all of it depth but since size is now just length instead of surface it is harder to compare tiny slivers. A flame graph can however be ordered by other criteria than size. Sunbursts are circular distorted flame graphs and are of dubious utility.