Clang's an important project if for one reason that is slowly starting to gain footage in GCC. Everything's callable outside of the compiler. You can have the compiler loop in your IDE, for example, and take advantage of its AST manipulation for better refactoring, its unidentified behavior sanitizer to immediately get a warning when you're heading into the tall grass, etc. GCC is stymied on this part by more conservative elements of their leadership that don't want to expose this behavior that is a growing necessity in code development.
Even if one insists on sticking with gcc on ideological grounds, one should be glad clang exists because it seems to have lit a fire under the maintainers.
The ideological reason to use GCC is to prevent clang/llvm from succeeding, which will drive everyone toward a copyleft product (GCC), which will encourage reciprocity.
Your observation is no consolation for someone who subscribes to that ideology.
(Personally, I do not subscribe to that ideology.)
