I can't say much about the question about ordering wide, but I do know that Munro leather boots stretch over time. I have had two previous pairs, one in this style and one other style. They definitely stretched everywhere, but not to the point that I had a problem with them being too loose. My foot runs narrow. Munro notoriously runs narrow. I also ordered these boots at the NAS but mine haven't arrived yet.
Can you use very thin socks so they are similar to tights or bare feet?
Do you have to return one pair to try the other?
I think there may be other black boots with similar heel height available and for good prices. I wouldn't keep them if they are not a good fit for your foot, or if you cannot wear them the way you would like. It sounds like you want to wear them with socks.
Personally, I always go for comfort right from the start and if the shoe doesn't fit I literally will not wear it.