Couple things to keep in mind. First, interviewing (both question and response) is more of an art form. For the questioner, they need to organize the interview to allow a better flow of information to gather the information needed to determine if the candidate is a good fit for the position. For the responder, to provide sufficient information to let the interviewer believe you are the best fit.
The other thing to keep in mind is the process if very subjective. An interesting thought - what if the first interviewer would have thought your second interview responses were perfect; and the second interviewer thought your first interview questions were perfect. Two different people looking for two different things.
Some tips to help with gauging this "happy medium" - pay attention to how the interviewer reacts. If you complete a question or two and it appears they are waiting for you to say more, they may be seeking longer answers. If you think this is the case, add a little more information in your next answers until it seems they are engaged with your answers and move straight to the next question (no pausing or looking at you like they are waiting for something). Conversely, if the interviewer appears to be distracted, eyes "glaze" over or seems to lose focus - your answers may be too long. If the interviewer appears to not be paying attention to you, you've lost them - time to make your answers more brief and to the point for this person.
Judging this takes time to learn that balance. It's part preparation and part psychology.
Ways to prepare - make sure you know about the position for which you are interviewing. The mind set is you are basically being a salesperson - you are selling yourself to the company - convincing them you are the best for the job. If you can find ways to have responses that speak to how you would be a better candidate than anyone else, based on previous experience, your quick learning, your dedication, etc - the better you get at selling yourself, the better chance the interviewer will remember you and consider you for the position.
I know when I was interviewing, I would include a story about some activities I participated in (and some I still do) and how those hobbies honed skills I could use on the job. Examples were that I was a competitive ballroom dancer in college (an unusual hobby that people would remember), also that I was part of a top team in a major trivia contest (another odd hobby that would make me memorable). I find using examples of hobbies or activities that you do that may be considered unusual makes you more memorable compared to others. If you can get the interviewer engaged with your story - perk up and become interested in you in a good way - that's what you want.
Remember to stay upbeat and positive - more confident vs "bubbly". If you are confident and smile, that puts people at ease. Being too nervous or doubtful or forgetting to smile and relax puts the interviewer on edge as well. It the interviewer is on edge, they may end with a more negative perception of you and you would be less likely to get the job. If you can make them comfortable, at ease, and interested in you - they will have a more positive feeling about you and that will increase your likelihood of being hired.
These tips won't always work - just some ways to increase your odds of getting the job.
Good luck!