DT Swiss 420SL Vs Mavic XC717

welsh_14

Still looking for some new lighter wheels and I have spotted some DT Swiss 420SL rims with Shimano M525 rear hub and XT cassette and a specialized front hub for sale. 32 hole rear 28 hole front. What sort of weight saving would I make with these compared to my current set of Mavic XC717 rims on Deore hubs both 32 hole with deore cassette?
They all have standard QR.