(not the parent poster) Depending on the nature of your project. If it's some purely academic CS exploration, Scheme sometimes (but not always) allows you to e

(not the parent poster) Depending on the nature of your project. If it's some purely academic CS exploration, Scheme sometimes (but not always) allows you to express the concepts more eloquently. If it has to deal with practicalities of the broader world however, CL quickly takes over. The development experience is generally smoother in CL too. If you run your things on a major architecture (x86 or aarch64) SBCL is a great starting point. However on certain platforms other compilers are more feature complete.