Actually your post should say draw 5 and draw 9 UP half a step, not down.
I have both tunings. Melody Maker is better for playing single note at a
time melody. It also is good for adding in the occasional accidental
because the bent notes are all useful notes. The Country tuned is
better if you want to use some chords or octaves. Drawing on the low
end is the I chord. Blowing on the low end is the IV chord. On a C harp
playing in the key of G you get a G chord and a C chord. On the
Melody Maker you get the G and an Am chord. In second position
the blow 6 is the the key note and on the Country harp you can play
the blow 6 and the blow 3 together as an octave. An expert player
can get the same notes available on the Melody Maker by bending on the
Country tuned, but if you can't get the 3 bends accurate on draw
3 then you would probably sound better on the Melody Maker.
If you like to play fast, such as Irish tunes or fiddle tunes, then
the Melody Maker is probably best because hitting bends
accurately at speed is difficult. If you want to back up a Country
music band with a singer then you probably want the the Country
tuned harp so you can add in some blues style riffs, chords, and also
follow the melody closer than a standard Richter.
This is all just my humble opinion as a perpetual amatuer.
Most Country tuned harps are labeled in first, so a C plays
in G in second. Lee Oskar lables in second so a G
Melody Maker plays in G. I'm not sure how Seydel labels
their version. I think it's called a Melodic Maker?
If you get a Lee Oskar Major in C and a Lee Oskar
Melody Maker in G you can swap the top plates and
have a Paddy Richter in C (nice for Irish) and a Country
tuned in C (plays G in second). So you can try four
tunings. Richter, Melody Maker, Paddy, and Country.