OP, sounds like you already prefer the 11" for several reasons. Save the money difference and just go enjoy. The only wrong way to go would be if you returned one that would not meet your requirements. If they both do, you've already decided.
Where did I say there was something wrong with asking others for their opinions? 🙄
Since no one uses an MBA/laptop/desktop like I do or has the same requirements I do, others opinions about how they use the same technology and what they bought and why, are not wrong, just of very limited value. Not really complicated.
This thread is not about ideas. It's about one person's ability, or lack thereof, to make a decision. It's a simple process to list your own requirements, in priority order, compare them against the features of the MBA11 and MBA13 and make a decision.