When comparing Steel Bank Common Lisp (SBCL) vs Guile, the Slant community recommends Guile for most people. In the question“What are the best Lisp dialects?” Guile is ranked 4th while Steel Bank Common Lisp (SBCL) is ranked 5th. The most important reason people chose Guile is:
Guile makes it easy for users of your application to write extensions without needing to understand the plumbing of your program.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Heavily developped
Has active contributors, including Google and some quantum computing companies engineers.
Pro Type inference and type checking
Incorrect type declarations are treated as errors. SBCL can deduce types quite well.
Pro Actively maintained
Bug-fixes, performance improvements, refinements. New ports.
Pro Fast native code compiler
SBCL (and CMUCL)'s compiler, Python, produces optimized native code.
Pro Easy install
Portacle makes it easy to install SBCL, Emacs and SLIME.
Pro Free Open Source Software
Parts of SBCL are licensed under a BSD-Style license. The rest are in the public domain.
Pro Easy to customize and extend applications
Guile makes it easy for users of your application to write extensions without needing to understand the plumbing of your program.
Pro GNU's official extension language
Chances are a system running enough GNU software will already have it installed.
Pro Excellent documentation
The documentation provides conceptual overviews, tutorials, and a detailed reference for all commands, functions, and operators.
Pro Fantastic interface to C, C++ in both directions, embedding guile in C/C++ and embedding C/C++ in guile
Cons
Con Confusing error messages
Con Produces large binaries
Con Weak copyleft
LGPL
