PMS returns are under regulatory process of standardisation i.e. on a Time-Weighted Rate of Return (TWRR) basis, but still scheme comparisons under the schme is somewhat difficult. Infact, client portfolio returns can be very different from aggregate scheme level returns in the short term. That said, most portfolio managers do publish basic comparison metrics. One should look at concentration levels, market cap bias (large cap / mid cap/ small cap/ Multi cap), AUM size, and then compare returns and risk ratios, along with a comparison to benchmark indices.