ETF Battles: IWM vs. MDY - Small vs. Mid Caps, Which is Better? By: TalkMarkets March 15, 2021 at 12:45 PM EDT Each fund is judged against the other in key categories like cost, exposure strategy, performance, and a mystery category. Read More >> Related Stocks: Mid Cap SPDR 400 Trust, Series 1 Russell 2000 Ishares ETF