Haven't played the KH player, but I played a Kenny Hill Estudio Cedar alongside an Estudio Spruce. Interestingly they exhibited the typical characteristics of spruce and cedar. The Cedar sounded fuller, warmer and more open. The spruce had those powerful focused basses with bright, tight sounding trebles. In that moment, I definitely preferred the Cedar, but I'd imagine I'd prefer the spruce over the long run.
If you already like Cedar, it would probably be the safest option to stick with it. The clarity of spruce requires more precise technique and better tone production for sure, which may be a problem if arthritis is getting in the way of your playing. I prefer spruce overall for its wider tonal palette and clarity, which I think is more versatile for a wide variety of repertoire, but I can also be happy with Cedar as well.
"Success grants its rewards to a few, but is the dream of the multitudes.
Excellence is available to all, but is accepted only by a few." - Christopher Parkening