Precision 3520 and Aspire A517-51G share specifications such as Storage Capacity (256 GB), Display Resolution (1920 x 1080), Form Factor (Clamshell), Operating System (Windows 10).
The main differences: Processor Model (Precision 3520: Intel Core i7-6820HQ, Aspire A517-51G: Intel Core i5-8250U); GPU Model (Precision 3520: NVIDIA Quadro M620, Aspire A517-51G: NVIDIA GeForce MX150); Installed Memory (Precision 3520: 16 GB, Aspire A517-51G: 4 GB); Display Size (Precision 3520: 15.6 inch, Aspire A517-51G: 17.3 inch).
Precision 3520 may suit users who need its differing values, while Aspire A517-51G benefits those who need its paired strengths. Review the specs table above before deciding.