Carry off vs. bring off

Carry off vs. bring off
 

Hello

Could someone tell me about the difference between the two phrases meaning "succeeding in doing sth difficult" and are they commonly used?

1- Bring off

- It was an important event, and she's managed to bring it off brilliantly.

2- Carry off

- I was flattered to be offered the job but wasn't sure if I could carry it off.

Thank you.

'Carry it off' and 'bring it off' will both work in the first sentence. 'Pull it off' could also used. ('Brilliantly' would be heard more in England. I would be tempted to say 'without a hitch', especially after 'pulled it off'.)

The second sentence should work, but I was having a lot of difficulty with it at first. I guess it's because of the doubt which is cast. I would prefer wording that conveys the idea of a less successful endeavor, like "I wasn't sure if I could make a go of it (make it work)". 'Carry it out' or 'see it through' might also work. 'Up to it' or 'up to the task' could also be used.

I would use pull it off in place of both of them, or as Rusty said "Up to it". The other ones sound very strange to me.
Also, I think you could use "but wasn't sure if I could handle it" or even "she managed to do it brilliantly"