Because their personalities are different. Roxas has a harder, sharper personality so he has a harder voice. Ven has a soft and caring personality so he has a softer voice
Roxas does not appear in Birth By Sleep. There is Ventus, who looks like Roxas, but is very different than Roxas.
They never recorded this song. Jim Morrison's voice is lower and softer than Eric Burdon's voice.
*NO SPOILERS*Ventus (Ven) is a protagonist in Kingdom Hearts Birth By Sleep, which takes place about 10 years before Roxas came into being, therefore, Roxas and Ven could not be the same person. However, Ventus and Roxas look almost exactly the same with the exception of clothing, which indicates some connection between the two. All of this is explained in Kingdom Hearts Birth By Sleep which is out in Japan and is scheduled to be released on September 7th, 2010 in North America and September 10th, 2010 in Europe. I don't want to ruin the game before it comes out, so lets not spoil the ending.
lOve is sOfter than a petal....
Sort of. Midna is a sort of imp at the beginning of the game, so yes. At the end, when she turns back into herself, her voice is a little calmer and softer than before.
The object which is softer than petal must be silk.
it is softer
Actually, Axel is a bit older than Roxas, causing Axel to appear much taller.
Namine knows more than Roxas for two reasons. The first, and most obvious, is that Namine (as far as we can tell) has known the Organization longer than Roxas has, giving her more knowledge. The second reason is that Roxas, unlike the rest of Organization, has no recollection of being a person. He has no memory, and barely speaks for the first week. Axel called him a "zombie" to describe Roxas at first.
Riku
SPONGE(say it loud) .... sponge (softer)
Limestone is softer than marble, but harder than chalk.