I’d definitely pick the Garmin over the King. The KLN 94 is old, clunky and slow compared to the newer Garmin 175.
Also, figure that any of these companies will likely only support their GPS products for 10 years or less after production ends. Production on the KLN 94 has been out of production for a while now, so the clock is ticking. And, the Garmin 175 is still in production.