When comparing CMUCL vs MIT/GNU, the Slant community recommends MIT/GNU for most people. In the question“What are the best Lisp dialects?” MIT/GNU is ranked 7th while CMUCL is ranked 13th.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Fast execution, faster compilation
CMUCL runs about as fast as SBCL, and they are both among the fastest Common Lisp implementations. CMUCL compiles faster than SBCL, cutting down on development, deployment, installation, and user testing turnaround time.
Pro Stand-alone executables
Pro Copyfree licensed (revised BSD license)
Most of CMUCL is in the public domain, with a few subsytems under permissive license.
Cons
Con No Windows version
Con Not made to run as standalone
Cannot be compiled to a standalone executable, only to byte code that can be run from the interpreter; and cannot be conveniently interpreted by the interpreter from the command line.
Con Not very well-documented
The documentation is very sparse.
Con Poor Windows support
Con Ill-designed interpreter's interface
The interpreter does not support the use of the left and right arrows to move the cursor in the code and the use of the up and down arrows to navigate through the history.