Any difference in functionality between the two 802.11n models?

Question

I plan on eventually having three airport extreme base stations in my house, in an 802.11n WDS network so I can stream HDTV and DVD movies between the many MythTV and XBMC machines on my network. My first AEBS is the MBxxx model, with the gig network ports. I just bought a second AEBS which was advertised as being the MBxxx model, but is actually the MAxxx model with the 10/100 ethernet ports. Awesome.
The only router I need to have gig ports is the one plugged directly into my backbone switch, so I could get away with the other two having 10/100 ethernet. What I'm wondering, though, is if there's any difference with the firmware between the two models. Will I lose any functionality by not having all MBxxx model routers, or run into any performance issues that are cleared up in the new models?
None of the AEBS's will be doing any routing; My Sonicwall will be doing that and my Windows server will handle giving out DHCP addresses to clients. Further, I plan on keeping an 802.11g router online (outside of the WDS network) so that older 2.4GHZ clients can use that network, keeping the Airport network 11n only. Am I ok to mix the older and newer AEBS's or should I keep the WDS ring MBxxx models only?
Thanks in advance.

Answer 1

Hi,
Those 2 queries are not the same.  Depending on your data, Query A, may select more rows than Query B.
I don't have access to your table, so I'll give an example using the scott.emp table.
The following 2 queries are similar to your 2 queries:
SELECT  deptno  -- Query A
,       job
,       sal
FROM    scott.emp  m
WHERE   deptno IN (
                      SELECT  sj.deptno
                      FROM    scott.emp  sj
                      WHERE   sj.deptno  = m.deptno
                      AND     sj.job     = 'CLERK'
AND     deptno IN (
                      SELECT  ss.deptno
                      FROM    scott.emp  ss
                      WHERE   ss.deptno  = m.deptno
                      AND     ss.sal     > 1200
SELECT  deptno    -- Query B
,       job
,       sal
FROM    scott.emp  m
WHERE   deptno IN (
                      SELECT  s.deptno
                      FROM    scott.emp  s
                      WHERE   s.deptno  = m.deptno
                      AND     s.job     = 'CLERK'
                      AND     s.sal     > 1200
The results of Query A are all 14 rows in the table, but Query B produces only the 3 rows from deptno=10.
Query A is looking for departments that have CLERKs, and departments that have sal>1200.  If one row in the department has job='CLERK' (no matter what the sal is), and another row has sal>1200 (no matter waht the job is), then that department meets both criteria.
Query B is looking for departments who have CLERKs whose sal is over 1200.  Both criteria must be met on the same row.