I purchased the one with the 44 Key Controller. Bench tested it, and works great. Waiting for the new RV to install. For the $3 difference, I'd definitely go with the 44 Key.
One thing I was curious about, was whether when you selected a mode of operation, for example white full brightness, it would return to that setting after power was removed and then reconnected. The one that I have does retain the settings. That way if it's connected to the porch light, it would come back on bright white when the porch light was turned on.
I can't speak for the other controller, and, I only left the power off for about 5 minutes. Don't know if it will retain the setting if it were off for an extended period of time.