Hey!

Gate is a national level entrance exam so possibly it would be more difficult when compared to bits high degree exam. However, there is benefit of attempting gate exam, as you would be able to get admission in any college in india with gate score whereas with bits hd you will only get admission in same college. And, if you wouldn't be able to clear that exam then you will have to attempt gate, so it is advised that you must prepare for gate and with same preparation you can attempt bits hd as well.

Hope I answered your query

Thank you