How does a decently overclocked 5080 compare to a 5090 and a 4090 now?

I’m wondering where the 5080 with its large headroom for over locking sits

Is it as powerful as a 4090

Is it within 30% of the 5090?

I have a 5090 pre ordered at £2350

However I’m considering dropping that down to a 5080 at £1150 if it’s not a huge distance from the 5090 when overclocked