Eglot does not have as many dependencies as lsp-mode and was designed to work closer with Emacs built-ins. Lsp-mode comes with many non-standard gui extensions

Eglot does not have as many dependencies as lsp-mode and was designed to work closer with Emacs built-ins. Lsp-mode comes with many non-standard gui extensions — with some of them being quite cool, honestly — but they make the setup more complicated. Eglot supposedly just works out of the box.