There are even differences within a brand name. Some are easier to apply and remove, others last longer. Speaking of the way they smell, I loved the way Meguire's Spray Wax used to smell, sort of a bubble gum oder. the last bottle does not have that.

 

Never really noticed the smell... then again, I don't like that stuff at all so I don't use it. It's easier for me to just apply a coat of wax rather than spray and wipe and still worry about blotching on trim and such...

I'm sure it's fine for some... I just don't personally find it that functional.