There are several key differences between the X-Carve Pro and the 1000mm X-Carve. The major difference is that the X-Carve Pro is a turnkey solution for small businesses. This is designed to work faster and takes less than 4 hours to assemble. It is a more rigid machine with a larger work area running on ball screws and linear guides for all axes and an air-cooled spindle. The X-Carve Pro is at a higher price point, as it is geared more toward production use.
The 1000mm X-Carve is a fully user-assembled kit at a much lower price point that takes roughly around 16 hours to put together but can serve as a project to better understand the inner workings of the machine. This creates a more budget-friendly solution for either hobbyists or small businesses (familiar or new to CNC) looking to improve their production but at a lower scale than the pro. The X-Carve uses a router with a direct drive Z-Axis leadscrew system and belt drive system on the X and Y axes.
The X-Carve Pro has a 4'x4' work area with a height of 4 inches, whereas the 1000mm X-Carve has a work area of 29.53in x 29.53in with a height of 4.5in.
X-Carve vs. X-Carve Pro (Comparison Sheet): https://www.inventables.com/technologies/x-carve-pro-vs-x-carve
X-Carve 1000mm: https://www.inventables.com/technologies/x-carve/specs
X-Carve Pro: https://www.inventables.com/presales/tech-specs