There’s a great review of both products.
If you’re working on a lower budget, then check out FLV Producer. Slightly different concept – they let you record your desktop (plus audio) but host the results.
If you are looking for a showcase of demos, check out:
Here are my personal fave demos (not from the link above).
Dan Thies on the keyword permutation tool (using FLV)
ActiveCollab (using Camtasia)