Griffin describes Mic Stand Mount for iPad as follows.
- Mount your iPad on a mic stand
- Screws onto industry standard (5/8" 27-thread-per-inch) microphone stands
- Fully adjustable tilt and swivel; locks safely and positively into landscape or portrait orientation
- Rubber inserts securely grip your iPad on its four corners
- Full access to volume controls, dock connector and audio jack
However, there appears to be one significant difference between the two. The iKlip attaches to the neck of a mic stand -- leaving the actual head of the stand free to hold something else (like a mic). The Griffin Mic Stand Mount for iPad, on the other hand, is secured to the head of a mic stand alone. This basically means, if you're a singer / instrumentalist, you'll need a separate mic stand if you go for the Griffin mount.
The Griffin Mic Stand Mount for iPad is priced at US$39.99 and will be available later this month.