I'm also a knife aficianado and am unhappy about Gerber's and CRKT's products where they change specifications such as knife steel without changing the designations of their products. Inova has done the same sort of thing and has changed the specs for many of its models without changing the designations. The new X5s, for example, are not an improvement in my opinion, as they add only a smidgen of brightness for an arm and a leg of runtime.
In other words, the original X5 had a runtime of 20 hours, whereas the new X5 is a little brighter, but the runtime has been reduced to about six hours. Both produce more than enough flood for almost any activity, yet the original blows the newer version away.
Inova also has changed the specs for the T4, the X1, and the X0, though these have some mitigating factors in that they've been improved and it's easier to tell the new style from the old.
Still, I don't like changing specs greatly without changing designations.