Having recently watched both the 1934 and 1956 versions of THE MAN WHO KNEW TOO MUCH, I have to admit I prefer the 1934 well over the remake.
It has nothing to do with the fact that its the "original" version. I feel that Hitchcock told the story in a more effective manner, especially using the visuals to tell the story over what felt like unnecessarily extended dialogue in certain scenes in the remake.
I felt that that length of the remake was too long, plain and simple. Hitchcock told the story in 1934 in 78 very tight, very effective minutes. The remake runs two hours. The exposition in the remake went on entirely too long for me. There was even a feeling that Hitchcock felt compelled to make the most of the foreign filming location, to provide all the detail he possibly could out of the setting, which did not add anything to the story for me, at least, and which felt entirely too long.
There is a tightness to the storytelling of the early British Hitchcocks, and I feel that its beneficial in this case. Also, I recently re-watched THE 39 STEPS, which is both immensely entertaining and incredibly brilliant without the techniques calling too much attention to themselves.