Yes yes and oh yes!
Lots of difference.
It depends on what you want in a dog and the breed.
Most fiest will stay closer and use site and sound to tree sq.
Currs use smell to tree. And can range longer. Lots of people will use them for day time squirrel and nite on coon.
Curr will eat more, fiest is lot less.
You will get more trees with a curr, but mostly more meat with a fiest.
Fiest are 30 pounds and less and currs are 30 pounds plus.
It also depends on the breed, such as my cur runs far and wide, but he is part walker.
Before you decide talk to the breeder about what his dogs do or even take a hunt with them.
They are many options to think about.
Check out
www.sqdog.com and you will learn a lot.