One difference is that earlier drdo said it was 150+km but now they are saying 85km whereas other countries testing it with 150-200km range with increased caliber like 58 whereas we are using 52.I believe DRDO is also developing one.
With these, we will have the capablity to hit Islamabad/Rawalpindi using 155mm. Not sure about the accuracy though?
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If they can get 150-200 km range it will be better than brahmos strike at 30kusd per target it will be mildly accurate with guided kit.