Coffee vs. Tea

Quick question. I am currently TTC baby #2 and also happen to be a coffee addict. During my first pregnancy I had to get up very early in the morning to go to work so I had one cup of coffee a day to keep me going. This time however, I've been thinking about switching to tea during the TWW and also during the pregnancy if I get pregnant. My question is this, what's the difference between the two really? I know that they say you shouldn't drink so much coffee in pregnancy because of the caffeine but tea has caffeine too. Is there another reason why it would be a good idea to switch?