asm vs tablespace vs table vs index

 Hi!

Before asm, a best practice said,  "create tablespace for tables" and "create tablespace for indexes" both on a different diskdrive

ex:  tablespace_DATA  on drive    and tablespace_INDEX on drive E:

my question is

with asm, whats the best way for keep the best performance...

1. create one diskgroup and create all tablespace on it

or

2. create one diskgroup for DATA  and one diskgroup for INDEX  and create tablespace_DATA on the first and create tablespace_INDEX on the second

thanks for your help