Rapscallion, I don't think there is a Heritage edc concentration. I believe you might be thinking about the edp concentration which is stronger than the edt. The edp is also very hard to find in North America.
The edp is great, but the edt is great also. I think the edt is potent and lasts well, thus it should make all Heritage users happy. The edp probably isn't at any Marshall's, and if bought new will be much more expensive than the edt.
I think the edt will make anyone happy for both its smell and its price at Marshall's.