A portfolio manager, Sarah, is evaluating the performance of her investment fund over a one-year period. The fund's return was 12%, while the benchmark’s return was 10%. The fund had a standard deviation of 15%, whereas the benchmark had a standard deviation of 10%. Sarah is assessing the risk-adjusted performance of the fund using the Sharpe ratio.
The risk-free rate during the evaluation period was 3%. Based on this information, what can Sarah conclude regarding the fund’s risk-adjusted performance compared to the benchmark?