What makes these Holosights better than the Other?

[Polish Thunder]

I cannot tell the difference from looking at them on line, but  the Sightmark, Mueller , Browning Buck Mark and Tru Glo all look exactly the same.  Price points are different. 

I am assuming that all are made by the same manufacturer, but just another name put on them.  If this is the case what makes one better than the other?

I personally have 2 Sightmarks for the last 2 years on my turkey rigs and have never had a problem.

just curious is all...

[bowhunter32]

With optics you really do get what you pay for...me personally i research stuff alot b4 i buy it...just remember..when it fails..itll b at the absoulte worst time..lol

[killdee]

I read the reviews on Amazon before I went with Mueller, some of the others, lower priced mentioned didnt fair so well.