Some have reported noise if staying below the pool deck on 10. It does vary with location. Also if you are seeking two connecting cabins, deck 10 does not always provide connecting verandas even with cabins that connect fwiw.
I would select deck 9 for those reasons; sound and connections, and you'll save a couple dollars too being on deck 9.
Of course if you do you're research on deck 10, and find the right peaceful cabin, and if you need the balconies to connect, that info can be obtained prior to booking theoretically.
Have you seen/read the room reports? Read those nearby too if yours is not available.
9036;
http://www.wdwinfo.com/wdwinfo/cruise-new/roomreport.cfm?Room=9036
All;
http://www.wdwinfo.com/wdwinfo/cruise-new/roomlist.cfm
I can't help but feel you need connecting cabins given you gave connecting/adjoining cabin #'s.
9036/38 connecting cabins I feel is a great location just aft of the forward elevator lobby port side. Cabins above and below. There is a small gray unknown are across the hall, but I would not worry about it. It seems too small to worry about.
Of course on deck 10 behind the forward elevators is a huge gray area related to the Adult pool area. I would hope being two decks down that wouldn't have an affect. I'm confident you are gooood.

I can assure you I would never want to be in those inside cabins below the adult pool equipment on 9, just aft of the forward elevators, IMO.
You're good as you are on the outside of the ship, but I would be fascinated in your neighbors opinion across the hall. But of course this info should be in the room reports. Remember, read room reports nearby.
Did I say I love 9036/9038 ? I meant to.
Enjoy
ETA; I noticed a new disclaimer in the Room Reports. I guess someone that read them, then sailed, was a lawyer. lol.
