I don't exactly know which is the better. Both laptops seem similar in specs.
http://www.costco.com/Acer-V15-Nitro-Laptop-%7c-Intel-Core-i7-%7c-4GB-Graphics-%7c-1080p.product.100279065.html
http://www.costco.com/ASUS-ROG-GL552VW-Laptop-%7c-Intel-Core-i7-%7c-4GB-Graphics-%7c-4K-Ultra-HD-%7c-1-Year-Accidental-Damage-Protection.product.100248155.html
http://www.costco.com/Acer-V15-Nitro-Laptop-%7c-Intel-Core-i7-%7c-4GB-Graphics-%7c-1080p.product.100279065.html
http://www.costco.com/ASUS-ROG-GL552VW-Laptop-%7c-Intel-Core-i7-%7c-4GB-Graphics-%7c-4K-Ultra-HD-%7c-1-Year-Accidental-Damage-Protection.product.100248155.html