I think my sister is copying my life and I feel ridiculous for caring

This sounds immature, but my older sister has started doing a lot of the same things I do and it is bothering me more than I want to admit. I started taking pottery classes last year. Two months later she signed up for the same studio. I got really into running, and now she is training for the same 10K I was excited about. I changed my apartment style a lot this year, and when I visited her place, she had bought almost the exact same rug and lamps. None of this is harmful. She is not being mean. If anything, maybe she just likes my taste. But I have always felt like the “less impressive” sibling. She was better at school, more confident, more outgoing. These hobbies felt like small things that were mine. Now I feel like even those are turning into comparisons. I hate that I care. I feel possessive over things nobody owns.