the STAR/R or other variations of Fit frameworks are just conceptual tools to make sure you deliver an answer which is
- With a relevant real-life example that should be credible or even better TRUE including IMPACT
Answer as per above show you have some of the key characteristics vs. the consulting job and can more easily be benchmarked vs. the key scoring dimension in interview (e.g. structured communication, …)
As such, you can answer using different framework in FIT, provided you maximize/keep under control the dimensions above.
Hope this helps.