I'm going to say not really, unless you're a very lightweight skater. Performance wise, I can't say much, other than the boots probably won't last you too long.
Stiffness wise, it's hard to exactly compare them, as Aura is horrible as giving any detailed information about them. Having tried the 200, as well as Ice Fly and Pianos, I'd say the Aura 100 is under Ice Fly in hardness, while Aura 200 is around Piano stiffness.