I recently bought a Worcestershire sauce from Costco called Lea & Perrins. They claim to be the authentic version of Worcestershire sauce. However I have read comments online that indicate that it is a knockoff or a fake version of Lea & Perrins Worcestershire sauce from the UK.
Within the comments most people say that the difference between the two is that the US version uses distilled white vinegar as the main ingredient whereas the UK version uses distilled malt vinegar. Is there really a difference between the two?