I think that the main difference compared to lua is in how you embed guile in multithreaded applications. In lua you use multiple interpreters and some sort of

I think that the main difference compared to lua is in how you embed guile in multithreaded applications. In lua you use multiple interpreters and some sort of channels between while in Guile you use one guile instance and multiple threads and environments. I prefer the guile way (and the guile language), but I know many that don't.