Chocse between 2 Hikvision bullets

[paulnye 0]

I am not seeing a great difference in specs in these 2 Hikvision bullets. It seems the first one doesnt have the horizontal pan axis on the mount?

Apart from that, which one is better?

 

DS-2CD2T42WD-I5

http://www.hikvision.com/us/products_10533.html

 

DS-2CD2042WD-I

http://www.hikvision.com/us/Products_1_10533_i7579.html