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I don't know if things changed on EFI models, but the lower hose on mine has a spring in it to keep it from collapsing (it goes to the inlet of the water pump).
On mine, the one coming off the thermostat housing going to the inside heater is 3/4" and the one coming off the water pump going to the outside is 5/8". Just changed them a couple week ago and couldn't get the outside one to stop leaking. Finally I checked the old ones and found out they were different. So swapped the outside one with a 5/8" hose, which went on with no problem, and no more leaks.