The key differences between the P1S and the X1C 3D printers are mainly in build quality, features, and price.

- Both have identical print volume (256 x 256 x 256 mm), similar dimensions, weight, and core XY fully enclosed design.
- The X1C uses metal and glass panels/doors, while the P1S uses plastic and glass panels/doors.
- Both have a maximum hotend temperature of 300°C and similar maximum speed and acceleration.
- The X1C has a heated bed that can go over 100°C, useful for some niche engineering filaments; the P1S bed heats up to 100°C.
- The X1C includes a touchscreen and AI features like spaghetti detection, which the P1S lacks but can be upgraded with third-party parts and add-ons.
- Print quality on the P1S is reported to be better or at least comparable to the X1C.
- The P1S is significantly cheaper (about $500 less) and offers better value for most users.
- The X1C is preferred if you need higher bed temperatures or specific advanced features, but for 99% of users, the P1S is the better buy.

In summary, the P1S offers nearly the same print quality and speed at a lower price, with plastic panels and fewer built-in AI features, while the X1C has a more premium build, higher bed temperature, and additional features but at a higher cost.