Jython should be fixed. CPython should be fixed, but don't hold your breath. Both behaviors are acceptable. In many cases, introspection yields different results. Where appropriate and possible, Jython will adhere to CPython's introspection behavior.
Some differences are acceptable.
Jython should implement CPython's -O option. Proper behavior here is still unclear. Jython uses different values for the IOError argument. Both behaviors are acceptable. Other attributes will probably never be supported in Jython due to its implementation of code objects as compiled Java bytecodes.