Ha! The second one is great!
But the instruments used in the example aren't really hard to play. If an unexperienced guy presses a piano key, the same sound will be produced as when an experienced guy does so. Same goes with the drums. Both are not difficult to play. The difficulty lies in the coördination of your extremities to make more complex melodies/rhythms. Other instruments like the strings, the oboe etc can generate duoharmonic melodies at most, but their difficulty lies in that their tone's based on how the instrument is made vibrate.
On the first one: techno for one isn't really my thing. It is not really hard to make. The instruments used in techno compositions are mainly: kickdrum, hats, snare/clap, subbass/midbass and lead and if we're lucky, we get a pad consisting of only 2 detuned saw waves. A good remix in my opinion will honour the complexity of the remixed song. One could for example remix canon's pachelbel an extremely simple melody, but the canon itself will never be well translated in the techno genre, so it's ridiculous to remix it. Same goes for Grieg's Hall of the mountain king. Just taking the first notes, speeding it up and putting it on repeat isn't what I understand under making a decent remix.
Here's another example:
Love the moonlight sonata and love this producer, but this remix is just ridiculous. They should leave the classical pieces alone. I'm not saying the combination with classical music is not possible, but atleast the producer should be original with it or create something of his own.
