Not quite, for the following reasons:

• qexercise was written in C++, MaeGym in Python
• Design goals are quite different.
  • Navigating the interfaces is quite different
  • qexercise uses multiple XML files whereas MaeGym uses 1 ini formatted config file and 1 sqlite database
• Not quite sure how to say this without being offensive, but it seems as though the developer of qexercise is focused on features, whereas I am focused on stability. That is, qexercise is more functional, but is riddled with numerous bugs.

Plus, these are both open source products (not sure of qexercise's license, though), so it's not like any money is lost choosing one over the other. In fact, you can evaluate both at the same time :-)