Multisite vs wpml for multilingual sites

I have built a multilingual static site in nine languages using WPML plugin. Those the site works OK the PHP memory used is very high. I am planning to rebuild the site with multisite and multipress plugin. Am I correct in assuming that the performance of the multilingual site would be better with lower memory? I would like to hear from those who have tried both for guidance and advice. The site is https://www.sriramanamaharshi.org