L1A is pretty much guaranteed a green card within a year(EB-1C), L1B is harder but also very much doable within the 5 years limit for B. Overall if you come as

L1A is pretty much guaranteed a green card within a year(EB-1C), L1B is harder but also very much doable within the 5 years limit for B. Overall if you come as an executive or managerial staff or are promoted to one within your employment you have a fairly easy green card to attain that H1B and many other visa holders don’t. As for the rest don’t underestimate the value of local networking and recruitment.