HTC Desire HD is released Sep 2010 and Sensation is Apr 2011.There are many differences between the two ultra Smartphones, but here I will from a new buyer's prospect to compare and analyze for you which one is right for you.
HTC Desire: $ 399-$459 Android OS v2.2
HTC Sensation: $459-$559 Android OS v2.3.2
There is less comparison between their prices, because price for each is proportional with their each related configuration like CPU, Storage, and Sensors. And the later released Sensation to take Android v2.2.2 is normal product rules.
Desire HD-----------Super-fast internet:
Register at HTCSense.com to manage your phone remotely and protect your phone in case of loss
Read eBooks on your phone
Watch Adobe® Flash® on websites
Easily transfer contacts, calendar events, and text messages from popular brand phones via Bluetooth
Check email from all your email accounts in one unified inbox
HTC Sensation----------A multimedia superphone:
Immerse yourself in richer movie watching and music listening experience with virtual surround sound.
Capture life in vivid detail on the full HD camcorder with stereo sound recording.
Easily trim your videos down to the best frames and share them on your favorite social network.
Share videos and photos to your big screen TV wirelessly via DLNA.
Connect to a Wi-Fi printer to easily print your photos, documents and web pages.
From the above brief introduction, we can easily get that Desire HD is more an Internet Smartphone while Sensation mainly focus multimedia function. So before you buy, think clearly what function is you need the most, if you spent a lot time on surfing online, the Desire HD is more suitable; if you spent time on video and audio enjoy and is fanciers to YouTube, Facebook sharing, then just take Sensation. And the other function you needn't worry there will be too much difference. You can from their Spec to get that both as 3G Smartphones their other function are equally able.
Recording 720p HD 3gp
Playback: 3gp, .3g2, .mp4, .wmv (Windows Media Video 9), .avi (MP4 ASP and MP3), .xvid (MP4 ASP and MP3)
Recording 1080p HD 3gp
Playback: .3gp, .3g2, .mp4, .wmv (Windows Media Video 9), .avi (MP4 ASP and MP3), .xvid (MP4 ASP and MP3)
They support the same playback video formats, but the sensation supporting 1080p HD 3gp recording resolution which is higher than the former, if you have special 1080p recording require, you should choose the Sensation, or it does little difference between them. And if you meet the question to convert HTC 3gp recording to YouTube or Facebook or iMovie, you can use HTC Smartphones to Mac Converter to solve this question.