[bashmohandes]

L1 is almost identical to H1b except for two main things, L1 grants your spouse an L2 visa which make him\her eligible to work in US unlike H1b\H4 nightmare, while on H1b you have more freedom applying for other jobs (if the companies are willing to transfer your visa) without going through the lottery again, unlike L1 which you get stuck with the same employer unless another company is willing to go through the lottery hassle with you. in short, Pick your poison.