Is Fireball better than Firebolt?
Fireball should be the more powerful spell, as it takes a spell slot and firebolt is a cantrip. Firebolt can be cast without a spell slot and as many times as you want, you can only cast Fireball as many times as you have spell slots for. A standard Firebolt is 11 damage. You can not Twin Eldritch Blast and Twinning Firebolt and Quickening Eldritch Blast would be roughly the same damage as casting Eldritch Blast twice (Quicken), but for 1.
Is Firebolt better than Nimbus?
Twelve months after its release, the Firebolt was the highest-selling racing broom of that time, beating out the Nimbus 2000 and 2001. The Firebolt was used by both the Irish and Bulgarian teams during the 1994 Quidditch World Cup. The Firebolt broomstick set a new standard for racing brooms, becoming the most sought-after model in the wizarding world. It boasted an incredible maximum speed of over 150 miles per hour, allowing it to go from zero to top speed in just ten seconds.