Specs on that EA4500 is WNPU is 1.2GHz with some enhancements to improve on it. RAM is 128MB Better support of DLNA devices with HD 1080p will now show up in devices like SONY SMP-100N Network Media player with 1080p /24p. I know it does show up now where it didn't under E4200V1 which had 480MHz and 64MB of RAM.
EA4500 on my Android Tablets I test and created my own tweaks for WiFi 802.11g @ 20MHz and 802.11n @ 40MHz version of { MWSSUM} Max WiFi SSS Ultra Max ROM Update on Kyros 7010, 7012, 7015, 7015A, 7015B, 7020, 7022, 7120, 7125, 7126, 8125, 8126, 1125, 1126 and soon the 7042 and 9742 and Skypad Alpha2.
If you look at this link you can clearly see how the Atheros 6003 WPN for mobile devices (Tablet) 802.11a/b/g/n @ 20MHz / 40MHz under EA4500.
Speedtest WiFi for Android speed test results using EA4500 with MWSSUM
http://i47.servimg.com/u/f47/16/87/26/77/screen26.png
XtremeTest WiFi for Android speed test results using EA4500 with MWSSUM
http://i47.servimg.com/u/f47/16/87/26/77/screen28.png
On PC side downloads under BT
Shows me 3.5mbp/s steady as she goes.
Where as the E4200V1 was 2.5 to 2.8mbp/s