2 Macs Same wireless network different speeds

I have an imac and mac book pro connected to the same wireless network ( both N speed ) Same room same signal strength.
The iMac has a very slow connection that sometimes comes good but mostly 1 tenth of the speed and hangs alot.
Where could the problem be ?
cheers
David

Assuming no other factors that would affect both Macs equally, the only real difference between the two is the wireless antenna used in each device. Obviously, they are designed differently so this could explain some of the disparity that you are seeing.
The other possibility is that either the iMac's antenna or built-in AirPort card is faulty. If possible, I would suggest that you make an appointment at your local Apple Store to have them take a look.

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