Doesn't matter what I'd get. If it's what you want to get. I prefer doorless. The 1200 has prolly the biggest perforated holes on the front side. It has dust filters for intakes. The most important I think is the top 20cm blowhole which can be enough for the entire case cooling. Also, there are venting holes at the bottom which is again very important.
The TT Armor has doors & small venting holes. I don't think it cools better than the 1200 even though it has a very large side fan. I used to have a 25cm side fan in an old case, but my new cm690 still beats it to the punch with smaller 12cm fans & bottom & top venting holes.