June 27, 2008 9:12 PM
Before I joined Sling I made a few posts about HAVA in my blog. I'll let those stand on their own. My personal choice was to get a Slingbox - long before I joined Sling. (I only joined Sling on April 7, 2008.)
One main difference is clients. HAVA has a client for Windows, no Mac support. They have a client for Windows Mobile. They also have a beta client for the Nokia tablets running Maemo. Recently they've promised a client for Symbian S60 in the future.
Sling has clients for Windows and Mac. SlingPlayer Mobile is available for Windows Mobile, Palm OS, and Symbian S60. Symbian UIQ is in late beta. Blackberry is due later this year. And we're working on a version for iPhone. We don't have a version for Maemo planned at this time. (Though I've personally suggested it as a platform to consider.) Beyond having more OS platforms, SlingPlayer mobile works on more specific devices than the HAVA clients. (You can't just support, say, Windows Mobile Smartphone and have it work on all WinMob SM devices, you always end up with device specific tweaks.)
Slingboxes also generally have more devices and remotes, and are able to control more source devices.
HAVA generally streams using MPEG-2 locally and MPEG-4/H.264 for remote connections. SlingStream uses WM9/VC-1 both locally and remotely. (H.264 and VC-1 are roughly comparable in performance as codecs.) Local streaming is pretty much the same, though the Slingbox needs less bandwidth since it is using a more advanced codec. Strictly speaking, since someone will probably call me on it, the HAVA streams locally at 720x480 while the Slingbox streams at 640x480. But you'd be hard pressed to tell the difference in practical application. (Of course, the forthcoming Slingbox PRO-HD goes to 1920x1080.)
Some of the HAVA boxes have built-in WiFi, which is something current Slingboxes don't have. (Note not all HAVA boxes have WiFi.) HAVA's roots have been tied tightly to Windows, so one thing it can do is work as a tuner for Windows Media Center. A number of the features you'll see mentioned for HAVA are actually WinMCE features, and only available when using the HAVA with WinMCE.
There also seems to be more 3rd party development and hacking around the Slingbox, but as I work for Sling I'll leave that to someone else to cover. ;-)
From a technical standpoint the HAVA does what it claims to do well enough. Clearly I'd prefer to see people buying Slingboxes, since I work for Sling and I prefer the Slingbox myself.
And no, we don't have any official forums, but some of us do read these forums, clearly.
-MegaZone, Sling Media Beta Manager
Slingbox Pro, HD Connect, TiVo Series3, TiVo Pioneer DVR-810H, SPM Treo 680, SP WinXP
(I also run GizmoLovers.com)