Aftre owning one for a year and reading assorted forums I wouldn't buy another tesla without having every nut, bolt, blemish, panel and component listed as to whether its warrantied or not - they seem to keep moving the goalposts.
There are no differences between the two. As long as the used vehicle is purchased from Tesla with less than 50,000 miles you’ll get the 4 year from purchase date and/or 50,000 additional miles, whichever comes first. A vehicle with over 50,000 miles will get you a 2 year from purchase date and/or up to when the odometer hits 100,000 miles. There was no language difference in the warranty I received than that of a new vehicle. However, you should take care to note that this warranty will not cover pre-existing cosmetic defects, paint scratches, scuffs on seats, etc.