ZHONGTONG Tractor vs Cat Tractor

ZHONGTONG Tractor and Cat Tractor Which one is better? What is the difference between ZHONGTONG Tractor and Cat Tractor which is of good quality, the editor learned through comparative analysis ZHONGTONG Beiben series Tractor,ZHONGTONG Sinotruk series Tractor,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 ZHONGTONG Tractor and Cat Tractor Which is better, please pay attention to global-ce.