2. surcharge, extra charge, additional fee or charge Customers are not willing to pay a premium. 3. bonus, reward, prize, percentage (informal), perk (Brit. informal), boon, bounty, remuneration, recompense, perquisite Shareholders did not receive a premium on the price of their shares.
The Flash is faster, which is why he's called the fastest man alive. Impulse stated that Superman can reach 99% the speed of light. Wally West (Flash) can hit the speed of light and even beyond. The Flash has the Speed Force, that's what gives him his speed.
Flash can go faster on earth because he is protected by the speed force from air resisitance and friction. Superman has to force his way through angry air molecules, and endure extreme heat. In space Superman could exceed Flash's speed; for example when he caught up with light escaping earth, and took a photo of it.