Liebherr Tractor vs Cat Tractor which is better

Liebherr Tractor and Cat Tractor Which one is better? What is the difference between Liebherr Tractor and Cat Tractor which is of good quality, the editor learned through comparative analysis Cat Wheel Tractor-Scrapers 631K (Tier 4 Final/Stage IV),Cat Wheel Tractor-Scrapers 621K,Cat Wheel Tractor-Scrapers 637K (TIER 4 FINAL/STAGE IV),Cat Wheel Tractor-Scrapers 657G,Cat Wheel Tractor-Scrapers 637G performance characteristics and detailed parameter configuration for the majority of netizens to refer to, understand Liebherr Tractor and Cat Tractor Which is better, please pay attention to global-ce.