Better sound with digital cable ?

Hi

Just ordered an iMac and recently bought Harman Kardon Nova speakers that have Bluetooth and Optical input

I was wondering if i would get a better sound with the Optical out from the imac than with the BT

Because the digital out goes out from a jack port not a real Optical out

Thx

hi

thanks for your response

yes, speakers will be just around the imac

i was confused by the formfactor and thought that i would need an adaptor, therefore would lose some quality in the signal

i'll go for it then