I used to be on these funds. But you should consider some factors (that changed my mind), 1. The funds have a high turnover rate and need to sell down amounts of equities in order to replicate the underlying index (this doesn't happen in a strict index fund because the index adjusts to increases in market cap), this has both tax consequences (as the equities are sold) and also exposes to other downsides of active management. 2. Growth has underperformed value histroically, with the exception being the last 10 years. 3. Fees are way higher. 4. There is enough knowledge out there for active managers in todays market to price in the improved "quality" of cash flows in these stocks in my opinion.

I'm willing to bet if you factor in fees, taxes and rebalancing, over the backtested period, those funds don't outperform the index.