Next are those who get a "reward" for every favorable review they write from some promotional sites.
Then there are those who work for the "competition" in some manner and their reviews are always along the line of "xyz model >>> SUCKS".
Maybe, just maybe, buried among the reviews there's one that is a real evaluation of the product.
I prefer to use the old school method of deciding on what I want to buy. I try to find the product in a real brick and mortar location where I can "fondle it" and decide for myself it's what I like. I then ask family, friends, and others, what their experience has been. I also look at the popularity of such items as scopes. If you don't see a lot of a particular model it often means it's a POS or is so outrageously priced that only a very few can pony up the "Benjamins" to buy it.
Tat said, I ave neither Vortex or Leupod scopes in my collection. I do however see lots of them at the range and elsewhere so I gather they're pretty good.
As for the difference between a 44mm and 50mm is all that much unless you're looking for the last little bit of light gathering capability. Look for a scope that gives nice clear vision at ordinary lighting conditions and it'll win out over a "not so clear" scope with a larger objective.