both of them is difference, but to make it easier to understand, when you investing, you trust your money to someone and you don't need and can't do anything with your money until certain period, when you trading, you used your skill and knowledge to generate profit and you need to some work in trading, you need to pay attention to the chart and keep the updated news everyday
so when investing you depend on somebody else when trading you depend on yourself
Indeed, who's in charge of the funds is one of the differences between them.
But trading could consider as an investment too as your funds spend to buy in order to get more profits.
The best between trading and investing? Of course investing will win the vote, due to many better options to invest your money and some has higher chance to give high return. On the other hand, trading require experiences and knowledge to judge the market in the future, to gain profit.