Howdy Oldmonk, and welcome to CPF,
Well, you have already ordered the Nitecore EC 21 flashlight, so you will know soon enough whether it fills your needs. I don't own the EC21, but Nitecore is a well thought of company and it appears to be a fine flashlight.
As far as the Alonefire E700, I only found an Alonefire G700, and it was listed as having an XM-L2 V6 LED, which it probably does. The problem with these Asian off-brand lights is that their quality control is typically not all that good, so you might get a good light, or you might not. Also, sometimes their materials and/or construction techniques are not very good, so the light might work ok for a week or a few months and then suddenly fail. We usually recommend staying with name brand lights.
As far as a hiking light goes, many CPF members prefer to wear headlamps when hiking, as it leaves both hands free for other duties. Also, some members will wear a headlamp that has a wide floody beam for seeing what is right in front of them and to the sides, but will also carry a handheld flashlight that has a narrower, more throwy beam for seeing farther down the trail.
I recommend that you spend some more time reading reviews on this site before purchasing any more lights.
Also, since the lights you are mentioning have the capability to use lithium-ion rechargeable batteries, I would recommend that you spend some time learning about the safe way to handle, use, and charge those batteries. They are small and powerful and potentially dangerous if not handled with care, however, by following some general guidelines, you can safely use them for many years. Be sure and check out the "Flashlight Electronics - Batteries Included" area here on CPF for further information.
So, my recommendation is to spend as much time as you can reading reviews and threads of interest here on CPF, and slowly you will begin to get a better feel for which flashlights will suit your needs best. Hopefully some other members will chime in with specific suggestions. Good luck and have fun : )