HTC sensation or HTC sensation 4G- i am confused

Well i have HTC sensation… and have heard about HTC sensation 4 G..
are both the same.. As i couldn’t found on google..
Answer #1
http://www.gsmarena.com/compare.php3?idPhone1=3922&idPhone2=3875
Apparently nothing except the battery is different!
Answer #2
thx
Answer #3
http://www.wirelessandmobilenews.com/2011/09/htc-sensation-news-new-sensation-4g-with-beats-bigger-battery-and-storage.html
appears there is quite a bit of diffrence
Link(s) coded. ~ figjam
Answer #4
no 4g in uk