Not much difference between tendulakr and viv, warne is an anomaly leg-spinner and is a must need for variety and wicket taking options in all conditions, but Hadlee like other debates tilts tis one in his favour as well, Ig so makes sense, though tendulkar/warne offer more variety
Sachin /Warne probably because Warne is extremely rare to get. He has no 80's equivalent. While Mcgrath was very similar to Hadlee. Sachin/Mcgrath vs Viv/Hadlee would be very close matchup.