The holographic sight requires more battery power and therefore has a shorter battery life and can damage your vision if the lense gets cracked. They are usually bigger units. As far as any other differences I think they are negligible.
I don't need No stinking signature.
I don't have an astigmatism but have heard the EoTechs work better if you do. I like both equally but feel there are some advantages to red dots. If you want a good red dot look into an Aimpoint. I prefer the H1/T1
“The bitterness of poor quality Lingers long after The sweetness of low price is forgotten.”
Originally Posted by Quentin
"The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together."