Options–> buyer of options always has the right & seller gives him the right; Call–> buyer is having the right to buy; Sell –> buyer is having the right to sell.
Futures :–> both the buyer & seller has the right to buy at a future date; the entire cash is not paid at the inception & only a Caution deposit is paid; any increase in Price, will be given to the Buyer on a day-to-day basis.