One person may see great results with one med, and others may find that the other is effective. It's very much a trial and error kind of process.
I WILL tell you that both Zoloft
and Lexapro are very good choices for a medication to start with, to try for anxiety treatment. Zoloft remains the most commonly prescribed antidepressant for anxiety, and Lexapro is probably a close second. I personally have been on both meds, at different times, and both were very successful for me.