It can still be cheaper if it can achieve the ultimate stealth that even the F-22 is incapable of:
But seriously, I wonder since I read that this new Russian fighter is developed for export. Will it also be used by VVS to replace their MiG-29? If that's the case, then they will go all Sukhois for both tactical and long range fighters. But if not, I doubt many nations will be interested in buying the fighter that the Russian won't use for themselves - just like what happened with the American F-20 Tigershark.
Now speaking about MiG, what happened to this company's project after its merger with UAC which Sukhoi is also a part of it?