Why use constructor function?

Question

What is the big difference between:

contract Crowdsale {
    MintableToken public token;
    uint256 public someInt;
    [...]

    function Crowdsale (uint256 _constructorArgument){
      someInt = _constructorArgument;
      token   = createTokenContract();
    }

    function createTokenContract() internal returns (MintableToken) 
    {
      return new MintableToken();
    }

and

contract Crowdsale {
    MintableToken public token = new MintableToken();
    uint256 public someInt     = theValueIWouldPassAsConstrArgument;
    [...]

    function Crowdsale (){

    }

The second version is much cleaner imho. I have less code. No need for constructor Arguments...

What is the difference? I would prefer the second version. But maybe I am wrong.

Answer 1

The second version will only work with hardcoded values.

How would you instantiate a new object with different paramters, dynamically?

You can't do this:

Crowdsale c = new Crowdsale(10);