MacBook Pro 14 M5 wins overall with 18-hour battery life (Notebookcheck) and up to 128GB unified memory versus Dell XPS 15's 12 hours and 64GB max. Dell XPS 15 provides a larger 15.6-inch OLED at 120Hz and better native Windows app support. The MacBook Pro 14 M5 outperforms on efficiency metrics from AnandTech benchmarks while the XPS 15 suits users needing extra screen real estate.