1, X4 mounter is a high-end model in Siemens mounter product line, which is suitable for mass production and high-precision electronic manufacturing.

2. In contrast, X2 mounter is a device suitable for small and medium-sized electronic manufacturing enterprises.

3.X4 mounter adopts advanced motion control system and precision sensor, which can realize high-precision mounting and positioning. X2 mounter adopts reliable mechanical and electronic components to ensure the stability and reliability of the equipment.

4. To sum up, X4 mounter is better.