Explore how differences in portfolio breadth, sector tilt, and trading scale set these two small-cap ETFs apart for investors.Vanguard Small-Cap ETF (VB +0.97%) and iShares Morningstar Small-Cap ETF (ISCB +1.00%) both target diversified U.S. small-cap exposure, but differ in cost, trading scale, and portfolio construction.Both funds aim to capture the U.S. small-cap equity segment; however, ISCB tracks a Morningstar index, while VB follows the CRSP U.S. Small Cap Index. Investors comparing these two may wei ...