The article says:
"Mr Marvellous is “simply a marvel”, able to cook better than Mr Greedy, outrun Mr Rush and even out-tickle Mr Tickle...
Clad in high heels, meanwhile, Little Miss Fabulous has “fabulous hair … long and luxurious and silky, and it shone in the sun like gold”, "
In other words, Mr Marvellous is marvellous because of his skills, while Miss Fabulous is fabulous because of her looks. Totally different emphasis.