1 The Standard Deviation is the amount of variance that took place for the designated time period. In general, the higher the standard deviation, the greater the volatility of return.
2 The Sharpe Ratio is a measure of risk-adjusted returns. It is calculated by using standard deviation and excess return to determine reward per unit of risk. In general, a higher Sharpe Ratio indicates better return for the same risk (or the same return for lower risk).