Difference between Cisco Nexus 3524 and Nexus 3524-X

[stevenj80241]

What does the X change other than 4k in price difference? I can't find any difference between the child parts, and the datasheets don't detail the difference and the part number descriptions are exactly the same. I have a lot of questions like this and am curious on where the answers can be found other than someone just somehow knowing.

Thanks in advance.

[Walter Dey]

The Cisco Nexus 3548x and 3524x Switches are the next generation of the Cisco Nexus 3500 platform. Like the previous generation, these switches are compact 1RU form-factor 10 Gigabit Ethernet switches and provide line-rate Layer 2 and 3 switching with ultra-low latency. In addition, they consume 25% less power. This new generation introduces powerful hardware-based multicast NAT and latency monitoring capabilities and a second USB port for easier manageability.

see 

http://www.cisco.com/c/en/us/products/collateral/switches/nexus-3548-switch/data_sheet_c78-707001.html