proof of work – How much bandwidth does POS use compared to POW?

I’ve been exploring POW vs POS and was concerned over how much bandwidth (data) it consumes.
For mining (POW) I found this to be relatively low after a quick google search, but I can’t seem to find any info on staking?
For purposes of this question POS is when staking from a desktop wallet.
Can anyone provide either sample stats or personal experience?