Difference between the Hikvision DS-7716NI-E4 and DS-7716NI-SP

[garyhgaryh]

Hi all --

What's the difference between the Hikvision DS-7716NI-E4 and DS-7716NI-SP (NOTE the suffix E4 and SP)?
I want to buy one of these with my ebay bucks offer (5x). The DS-7716NI-E4 seems
a little less expensive and can support up to 6M (vs 6M picture).

I'm looking to order from this vendor:
http://www.ebay.com/itm/Hikvision-DS-7716N-E4-16P-Network-16CH-NVR-with-16-POE-Interface-IP-Camera-NVR-/121699428858

Any issues with getting a multilanguage version vs the English version?

Are there any after market NVR that also supports sPOE (zmodo/funlux POE)?

Thanks,
Gary