Play that single note 100%

Merry X-Mas from Denmark

They do not sound that much different. As always, it's about 95% the player for the final sound. Golden Melodys are good for the advanced "over-blowing" technique a la Howard Levy.
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From the TERMS AND DEFINITIONS page-

Overblows (overdraws)- An advanced technique used on diatonic harmonicas to get the remaining missing notes from the chromatic scale that a player cannot get by normal blow and draw notes or by standard bending technique. The overblowing and overdrawing will cause the note you are playing to go up in pitch and is done on the reeds that do not normally bend at all (i.e. 1-6 blow and 7-10 draw).

As well as being very difficult to do, this technique can only be done well on certain types of diatonics (the Hohner Golden Melody is the most common choice) and these harmonicas normally must be adjusted to facilitate the overblowing (typically by lowering the reed gapping). These adjustments to the harmonica may create other problems for the average player and especially for players just starting out. It is also very difficult for players of all levels to play overblow and overdraw notes in tune.

Overblows and overdraws are useful for some advanced players, but we don't recommend the technique for beginners or the average player. If you would like to play music that involves a greater use of notes than what is available on a standard diatonic (i.e. jazz, classical, or more sophisticated pop melodies), the best and easiest choice would be the chromatic harmonica.

Play on,
Dave Gage