This is sub-Himalayan Asia back home.
As one can see, it's pretty much India, Bangladesh and Pakistan surrounded by the warm waters of the Indian Ocean.
And this is Everest, the world's highest peak, standing 29,029 feet above the level of the sea.
The Himalayas, the range in which Everest is a part of, are so tall that they amplify the power of the Indian Ocean monsoon, bringing water to one billion people.
This is an alternate sub-Himalayan Asia:
As you can see, Borneo has blocked off the Bay of Bengal and Sumatra has become an extension of western India. The rest of Indonesia and the Philippines don't exist physically.
The location, shape, length and width of the Himalayas are the same. But in this alternate scenario, the highest number has shifted from 29,029 feet above sea level to 33,500 feet, the equivalent to Mauna Kea, Hawaii, the REAL tallest peak in the world.
Another change is that the sea dividing Europe from Africa isn't Mediterranean, but Tethys.
This super-sea that connects the alternate Asia to the alternate Atlantic, as it used to back home, averages 1205 meters in depth and has a maximum of 7,000 meters.
Would these three changes bring a dramatic difference to the Indian Monsoon, or would it stay the same?