Interesting point about Russia supplying the same tank to both India and Pakistan. I thought China was the main supplier of arms to Pakistan although the T90 is probably a much better tank that anything in China's arsenal.
You are correct - China is the largest arms supplier to Pakistan. But you get what you pay for (keep in mind that WalMart does most of its shopping in China). Pakistan must have figured out that it needs smarter weapons since it is not fighting the Northern Alliance (on behalf of the Taliban) anymore.