It is likely that DL only has one 'set' of Elite Award Availability that applies across all Elite tiers, so there should be no difference regardless of which account you use.
Here is an update logged in as me:
MON 07 May 2012 | 1 Seat | SM Status: Diamond
Carrier Flight From Depart To Arrive A/C St Information
--------- ------ ---- -------- ---- -------- --- -- ----------------------------
DL/XJ 2537 MSY 07:20 MSP 10:10 CR9 0 Dur: 02:50 | SM: 12.5K+2 USD
</pre>
And logged in as her:
MON 07 May 2012 | 1 Seat
Carrier Flight From Depart To Arrive A/C St Information
--------- ------ ---- -------- ---- -------- --- -- --------------------------
DL/XJ 2537 MSY 07:20 MSP 10:10 CR9 0 Dur: 02:50 | SM: 20K+2 USD
</pre>
I called Delta and they told me the same thing