What are some alternatives?
When comparing Dell Precision 7730 and ASUS ZenBook Pro UX501VW, you can also consider the following products
Dell XPS 15 - Dell XPS 15 is one of the most powerful laptops on the market that comes with Intel Core i7 processor and Nvidia GTX 1050 graphics.
Razer Blade Pro - Razer Blade Pro is one of the most powerful and yet slimmest gaming laptop in the world that delivers an immersive experience in an incredibly thin form factor.
System76 Oryx Pro - System76 Oryx Pro is a powerful and customizable laptop that comes with Linux pre-installed, but y can easily install Window and dual-boot if you want to use it for Windows development or gaming.
Lenovo ThinkPad X1 Carbon - The Lenovo Thinkpad X1 Carbon is an excellent business Ultrabook which will get the job done, no questions asked. It's extremely sturdy and durable without making any compromises in overall design or portability.
HP Spectre x360 15t - The HP Spectre x360 is an excellent 2-in-1 laptop with long battery life and an amazing display. It's very slim and lightweight, which makes it perfect for people that use their laptop on-the-go.
Dell XPS 13 - The XPS 13 ships with either Ubuntu or Windows pre-installed and is a top-of-the line ultrabook, with specs similar to the Macbook Pro 13", but half a pound lighter.