请教各个公司的level 比较

最近找工作，了解了下一些公司的level。不知道对不对。基本以Google 为基准。基本的感觉是google，facebook level相等。听说airbnb也跟G和F一样的level？linkedin 的level 比他们低一级？uber感觉高一级？

• L3: Software Engineer II - Google L3 - Facebook E3 - Linkedin 4 - Airbnb L3 - Uber SE I
• L4: Software Engineer III - Google L4 - Facebook E4 - Linkedin 5 - Airbnb L4 - Uber SE II
• L5: Senior Engineer - Google L5 - Facebook E5 - Linkedin 6 - Airbnb L5 - Uber Senior
• L6: Staff Engineer - Google L6 - Facebook E6 - Linkedin 7 - Airbnb L6 - Uber Senior II
• L7: Senior Staff Engineer - Google L7 - Facebook E7 - Linkedin ? - Airbnb L6 - Uber Staff