Hi!
This is a good question, and you are right to be mindful of sounding repetitive - however, I'd say that these two questions are asking for slightly different things.
For the vacation scheme question, I'd think of it more in terms of exploration. You don't need to be set on these areas long-term - instead, I'd focus on what you are curious about and why you'd like exposure to them during the scheme. It is completely fine to say that you are still exploring your interests, and you can frame your answer around wanting to gain insight into a couple different areas to better understand where your strengths and interests lie.
You can also broaden this beyond just practice areas. For example, you might mention an interest in learning more about the pro bono work the firm does, client or international secondments, or business development at the firm. The graduate recruitment team might use these answers to help shape sessions during the scheme, so it is a good opportunity to show curiosity about the wider workings of the firm, not just the legal work itself.
For the training contract / specialisation question, the expectation is slightly different and I'd say you should try to show a more considered and developed interest. That doesn't mean you have to be 100% decided (+ I would avoid sounding completely set on an area), but you should be able to explain why certain areas appeal to you and how that ties into your past experiences, skills, interests, and longer-term career goals.
It is absolutely fine if there is some overlap in the areas you mention, but the angle of your answer should be different - one is about what you want to learn, and the other is more about where you think you'll fit long-term
