Originally Posted by
SpeedyJEP
Since the OP lists Delta on his profile:
ExpertFlyer shows the medallion/pmu/miles upgrade buckets of V,G,X, and Z, which KVS does not. So if you're mostly interested in upgrades, ExpertFlyer may be the better product.
Conversely, KVS shows award availability for SkySaver and SkyChoice seats, which ExpertFlyer does not. So if you're mostly interested in award tickets, KVS may be the better product.
So if you're interested in both of these kinds of seats on Delta, you may need a subscription to both.
The KVS listing of SkyTeam reward seats is just a view off the nwa.com JP site, so you can search that directly if you want. There are a few other bits that it can also add in, but most of the info is publicly available through other sources if you're willing to dig.
I have KVS and I like it, but the reward info isn't secret.