The boarding passes are not different, the exact boarding pass with the seat assigned and flight details are provided whether you check-in at our airport counters or online.
When the Online Check-in is completed, there will be an option to print the boarding pass or have it sent to you via email. Specific and chosen airports around the world accept boarding passes saved on mobile devices. Due to this, the passengers can download the boarding pass any time before the departure date and present it at the Bag Drop counter if the checking of baggage is done or proceed to the boarding gate.
For airports that don’t accept mobile boarding passes, the hard copy should be kept, for being on the safer side.