The ASUS ROG Strix G18 wins on raw performance with its RTX 5080 and 32GB RAM versus the Blade 15's RTX 5070 and 16GB (per Notebookcheck benchmarks). The Razer Blade 15 excels in portability with its 4.4 lb weight and OLED panel but trails in upgradability and sustained power. Choose the Strix for desk-based 4K gaming sessions and the Blade for travel.