If those were the only two choices, I would definitely recommend The Woodlands over Katy for a commute to Aldine. You have a choice of taking the Hardy Toll Road or I-45 for access. The commute times from Katy would be substantial during rush hour. You might want to consider either Humble area or Lakes on Eldridge as alternatives as the commute would be substantially less than either Katy or The Woodlands to Aldine
Thamer, I'm not sure exactly what your question is here, are you saying your office is in the Aldine area? If so, then that's a pretty close call as far as distance/traffic is concerned, but I believe that The Woodlands would be a better fit from that standpoint. If you'd can like, you can take advantage of HAR.com's Drive Time tool, and get a better idea! The link is attached below, good luck!