Difference between General Ledger Accounting (New) and Old

Hello All,

Please help me with the below:

1)Could any one please explain the difference between General Ledger Accounting (New) and General Ledger Accounting (Old).

After going through the help document I understood that the BI 7 version came up with General Ledger Accounting (New), If this is true then can we still use 0FI_GL_04 in Ecc and BI7.0?

2)what is the difference between 0FI_GL_04 and 0FI_GL_14?

3) Is there any material or link or pdf that explains more clearly about FI - GL implementation in BI.

Thanks in advance.Your help will be much appreciated.