What do you mean here? Easier or more accurate? They are both equally easy to predict.
This must mean something other than trying to predict the outcomes of a toss. In that case, it's much more accurate to predict the outcomes of many coins than of one. A short stroll along Las Vegas Blvd should be convincing.
you: What do you mean here? Easier or more accurate? They are both equally easy to predict.
If you are tossing a single coin, the results can be heads, tails, or sitting on its edge.
But if you have a pocketful of change, the number of possibilites per coin does not change - but you must first count the number of coins and then figure all possible permutations according to geometry as they may fall, i.e. the coins may fall in a straight line, in bunches or stacked, etc.