Willie, yes strictly speaking you are correct, but up here we tend to class them all as breeks, when I say I use breeks for the hill
its +4s as I find the others uncomfortable when wet, that 4 inch drop runs the water on to the ground not down your boots
and find when crawling thats the part in contact with your knees when you stand up the wet bit is below your knee, plus 2s not only have less drop but are also tighter so the water tends to run straight from the drop into your boots, if you wear gaiters then its no problem, but also find that+4s being wider in the leg they don't rub against your skin so much as the others or cling to your skin when wet, but its what ever you feel comfortable with, the days of getting funny looks if you appeared with anything other than +4s on the hill are gone, thank god!