Pavilion Power and Precision 3520 share specifications such as Display Size (15.6 inch), Display Resolution (1920 x 1080), Form Factor (Clamshell), Operating System (Windows 10).
The main differences: Processor Model (Pavilion Power: Intel Core i7-7700HQ, Precision 3520: Intel Core i7-6820HQ); GPU Model (Pavilion Power: NVIDIA GeForce GTX 1050, Precision 3520: NVIDIA Quadro M620); Installed Memory (Pavilion Power: 12 GB, Precision 3520: 16 GB); Storage Capacity (Pavilion Power: 128 GB, Precision 3520: 256 GB).
Pavilion Power may suit users who need its differing values, while Precision 3520 benefits those who need its paired strengths. Review the specs table above before deciding.