First off, the main difference between Looft Lighter I and Looft Lighter X is that the Looft Lighter I has a cord while the Looft Lighter X has not. That makes Looft Lighter X super simple to bring anywhere you want as you don't need an electrical outlet! The Looft Lighter X also has an automatic ignition program which you can read more about here. LINKS SHOULD BE WRITTEN IN RED
In summary, both products will light your fire really fast but if you want the latest innovation and use it where there is no electric outlet we would recommend the Looft Lighter X.