Just got into polishing and was talked into the Flex. I did 2 cars my first week of owning it and couldn't be happier. Yesterday at Adams clinic they showed the PC and the Flex. Wouldn't say one did a better finish but the Flex did it much quicker. I would go someplace and hold them then decided if one feels better in your hands. If time is a big factor and they both feel good Flex all the way.