I'm looking at these 2 scopes in 3.5x21x50. Besides the ERS having zero stops and coming in dark earth is there any other differences? I've compared them on bushnells site and all the specs are so close (within .007" FOV, 2.5 oz weight diff. Ect). Is the glass and turret better on the ERS? I guess I'm asking is the ERS worth $500 more? On swfa site they don't even give the ERS designation on the scopes just the huge price diff. Thanks for the input