wow. this is definately going to be "Rafale vs Eurofighter" 2.0!
if any major indian int'l bidding process is any guide, the following are the clear guidelines:
1. high speed train is much more complicated and expensive than AMCA. The bidding process alone will last 15 years at least without a clear winner, depending on the all levels of kick-backs here or there - the phenominon seems once more to underscore Indians' true love for heavy BDSM (receiving, of course).
2. India has no money hence zero finance, heavy lack the corresponded supporting infrastructure for the high speed rails (stations, rail tracks, electricity suplies, etc), no skilled railed workers, no enough legalised and dedicated land available, no expertise of effective administration(of even a slow train) , whatsoever.
whoever builds this is going to prepare to do it for FREE at best (suffer heavy loss at usual) for the next 100 years and take the huge hit on its int'l reputation of reliability and efficiency afterwards, because big accidents are bound to occur on Indians' watch frequently, before trapped into some 50-year-long lawsuits by Indian courts for massive compensations of all kinds... It's Incredible India after all, be warned.
3. So i highly recommend China quit this after the initial bidding (bait), and leave the hanging rope for friendly Japan instead.
4. an advice for japan's bidding firms: construct at least 500 hooks on top and on both sides of each train to suit the locals. A completely innovative country-specific urgent warning system must be invented and installed along the rails to warn off in time those who will handle their "nature calls" inside high speed tracks on a daily basis. After a passby of a high speed train, the biblical "when Sh!t hit fans" is bound to play out in its full grandour in either case without any strench of imagination. Good Luck!