An inverted-V dipole is surely more fit to use here in the UK, where the higher takeoff angle is actually beneficial because there are alot of chasers nearby and the relatively low summits provide enough room to spread your guy wires / dipole arms.
However, Western Europe is a special case, activators in other parts of the world might prefer a low-takeoff antenna that provides much better coverage to medium distances (and even long distances, if QRP makes it across) so they can reach enough chasers. Most of my activations were done in Romania, and in a 1500km radius you can barely find 1-2 chasers on the air at one point … of course you want as low takeoff as possible.
Then there is also the matter of transporting and installing the antenna. Tall summits tend to be rocky and narrow and the winds are no joke up there. A vertical requires just one point in the ground to drive a stake in (worst-case, you hold it with one hand), has a smaller wind surface, can be thinner because it doesn’t need to support extra weight and requires less coax because its fed at the bottom. All these things add up to a lighter backpack as well, wich gets significant if you have to hike 20km with 1500m+ level difference in one day.
I guess what I’m saying is there is no “best” solution, just stuff that fits better to a given situation.