FT member Lux had recently put together a set of comparison charts
The chart doesn't include AwardNexus, which compares more directly to KVS as it screen scrapes some of the same airline websites for Star Alliance and Oneworld to get their award data, and some additional ones as well. I use AN it as it has more search options and a free version available for FlyerTalk members. It only requires a web browser to use, not a download. Something else to consider in the mix.