whats the difference between python 3.3 and 3.3m [duplicate]
The m suffix means specifically a "pymalloc" build of Python, and it may mean that the ABI of 3.3 on your platform is not the same as the ABI of 3.3m. Extension modules must be built for the specific ABI in question. This means that 3.3 extension modules won't work with 3.3m and vice-versa.
The change to tag Python versions was proposed and accepted as PEP-3149: ABI version tagged .so files.
python3 is a symbolic link to python3.3
python3.3 is a hard link to python3.3m
And as @nneonneo 's answer indicating, The m suffix means specifically a "pymalloc" build of Python. Then the links do what they do.