I have a narrow low volume foot. Last summer I purchased no less than 12 pairs of boots of various brands after my La Sportiva Trango Cube's were warranted for the goretex failing. Over the previous 5 years I've only run la sportiva boots and the fits have been perfect for my foot. Omega GTX's and a couple pairs of the Trango Cubes. I love the trango Cube's fit but haven't had good luck on them being water tight for cold rainy days.
Anyway, I bought various Scarpas, the Kuiu Scarpas, Schnees Granite Pros, La Sportiva Nepal Cubes. I will tell you the Schnees were massive volume and width. The Scarpa's with the built in gaitor were too loose in the ankle for hunting plus higher volume than the La Sportivas, the scarpa charmoz OD was a similiar fit to the La Sportiva volume and narrowness, the scarpa grand dru has much more volume and width than La Sportiva. The Nepal Cubes fit me the best out of the box and although they are at the stiffest end of normal boots, I was going to go with these but ended up sticking with a half size too small and my first trip in them tore up my heel because they were too small. I've always worn a 43 in la sportiva but dumbly went with 42.5 in the Nepals. Anyway, when I wanted to move to the 43's, backcountry didn't have any in stock and I was going to get store credit for the boots that I had used but was going to return. So, in the end I went with the Grand Dru's because I was going to alaska and wanted a silicone impregnated leather boot rather than synthetic (great decision btw on the leather).
The grand drus are much higher volume and not as narrow so I had to put in a green superfeet which took up some of the volume. I have to really work to get them tight enough in the forefoot and I definitely notice a touch less precise fit that la sportivas, but it is what I had to do with a trip coming up hot last year. I ran the grand drus all fall after caribou hunting and probably put over 100 miles on them throughout. They are bullet proof, way warmer than synthetic, have never leaked, even in snow, tussocks and soaked alaskan ground day in day out, and multiple days of rain during the fall and spring. With that said, I wish La Sportiva would make the Trango cube in a perwanger silicone leather. Would be the perfect boot for me.
My plan is to pick up either the Scarpa Charmoz OD or a new pair of Trango Cubes for summer time mountain travels, then use the Grand Drus when I'm going out in colder temps, or bad weather forecasts here in Idaho. The Charmoz fit really well, narrow and low volume and I would have gone with them originally had it not been that I was going to alaska last year.