Of course what most fail to understand in this thread is that mountain warfare is fundamentally different from ground warfare, which is why different tactics tend to be used. The only way for China to force Indian positions out is to either assault them in human wave, highly likely based on the fact they seem to regard their soldiers lives as pawns, which in this case, will lead to a huge defeat for the Chinese. They could also use multidirectional assaults and scale steep cliffs in order to force Indians out like the Indians did in Kargil, or they could use their AF to bomb Indian supply lines, and their AF is objectively superior to the IAF in every way. The last option is highly unlikely due to the threat of full scale breaking out, so a war between India and China will likely happen in the format of the 1962 war, only with more advanced gear, and hopefully nuanced tactics.None of the Mech advantage will suffice in the mountains, except in a few stretches of LAC where we match china pound for pound in mechanised forces , 90% of LAC is such that only light troops can fight and dominate areas of concern. pLA tech advantage on a soldier to soldier basis is not great. I've never seen them with sights or body armour at the LAC. Much of what they show to the world is propaganda. You're right the war in Ukraine isn't applicable here, infact it will be 50 times more worse for china, russian mechanised forces failed in Ukraine against a smaller and less mechanized, less advanced Ukrainian army on flat terrain , the chinese will face a much worse fate in Himalayas
The issue the Indians need to be aware about is their logistics. The main reason the Indians lost the last war and Galwan is because they had shit logistics. Meanwhile, in Doklam and recently Tawang, the Chinese were brutally humiliated and made to run away when they had their prep together. Logistics will determine the victor of this war, which is infinetly more important than how many M4s 9 para sf can acquire. What’s the point of acquiring such equipment if you can’t supply them adequately?
However, this is all in the case an actual war breaks out. This is highly unlikely and what we will see is hand to hand clashes taking part.