The 45mm Riddler and the Resolute are nearly the same size, my {42mm} Resolutes measure nearly 45mm on WTB’s KOM i25 rims,

...why I would pick the Resolute over the Riddler for what I tend to do most with my gravel rigs:

The biggest difference is in how the Resolute has an uncanny ability to roll faster on pavement with a less “draggy” feel when pedaling. Coasting with Resolutes is fast and free on pavement. Don’t let what your ears hear fool you, the Resolute has a noisier sounding roll than a Riddler does, but it rolls faster than a Riddler. The Resolute also reacts well under hard pedaling on pavement also. I always felt that the Riddler had a higher rolling resistance when mashing the pedals.

The second reason I would choose a Resolute is comfort. Now WTB says that the casings on the Resolute and the Riddler are the “TCS Light, Fast Rolling” casings, but the Resolute, for whatever reason, seems to have a slightly more forgiving ride. I’m not sure why this would be, but I do feel a slight advantage to the Resolute.

{GK-SK} doesn’t fare well when things get wetter. This is where the Resolute comes out ahead. Plus, a Gravel King has a tendency to fling smaller bits of stone at times, which can be annoying. The Resolute will never do that. Nothing against the Gravel King in that regard, just a footnote there.

The Gravel King doesn’t quite ride as nicely either, which I would say is due to the puncture protection belt that Panaracer put in it. Of course, that can also be seen as a positive depending upon your needs.

the Resolute does harder, paved surfaces far more effectively than even many so called gravel tires that lack much for grip off road or in the dirt... Add in the float that Reso’s can give you... and you have an all around tire for most conditions that gives away little, if anything, to any other tires in its class.