Inspiron 7378 and Precision 5520 share specifications such as Storage Capacity (256 GB), Display Resolution (1920 x 1080), Brand (Dell), Operating System (Windows 10).
The main differences: Processor Model (Inspiron 7378: Intel Core i7-7500U, Precision 5520: Intel Core i7-6820HQ); GPU Model (Inspiron 7378: Intel HD Graphics 620, Precision 5520: NVIDIA Quadro M1200); Installed Memory (Inspiron 7378: 12 GB, Precision 5520: 8 GB); Display Size (Inspiron 7378: 13.3 inch, Precision 5520: 15.6 inch).
Inspiron 7378 may suit users who need its differing values, while Precision 5520 benefits those who need its paired strengths. Review the specs table above before deciding.