The difference is that the knife and fork are held the same way in both hands (fork in left hand, knife in right hand - if right-handed) if you eat euro style, eg. you lay your hands flat over the instruments on the table, pick 'em up, and keep your hands horizontal to the table, with your elbows tucked in. You then use the knife to cut, and press food onto the fork. US style, you start out the same way, cutting up the food, then you put the knife down, and transfer the fork over to your dominant hand (the right in my case), and use the fork as a scoop (the fork tines are now pointing up instead of down). Clear?