My friend always preferred Fal for her wide welsh cobs, she felt they were roomier in the shoulders. I have to say the only Fal rug I bought, fell to pieces really easily and my horse was NOT hard on her rugs. I am a Horseware fan.
My horse's fal rugs are all 6'6" - same as his rambos. However, they are the older fal rugs; I have heard from a few people that the newer ones are not great quality and come up a bit snug.