Which Space and Defense ETF Is the Better Buy: ARK's ARKX or First Trust's MISL?

ARK Space & Defense Innovation ETF (ARKX) delivers higher returns (28.8% over 1 year) but with significantly higher volatility and a 0.75% expense ratio, while First Trust Indxx Aerospace & Defense ETF (MISL) offers steadier performance (22.6% returns) with lower costs (0.6% expense ratio) and reduced risk. ARKX is suited for aggressive investors backing Cathie Wood's innovation thesis, while MISL appeals to those seeking stable aerospace and defense exposure.