That chart is very partisan. How can they score the T-50 on anything when little is known about it's radar, the data link that it will incorporate, the EWS it will use, etc. I mean as far as I am concerned this is merely a tech demonstrator, the Russians have to develop the following:
- AESA radar with LPI and possibly multi-antenna suite
- brand-new jet engines enabling supercruise
- integrated electro-optical IRST/EW suite (DAS + EOTS)
- integrated self-protection and jamming system (Barracuda, SPECTRE)
- advanced RAM materials
- net-centric technology
- advanced methods of integration and quality control for all above
And keep it at a reasonable cost i.e. <100 million US Dollars. Sukhoi has a huge task in front of them and almost everything is contingent upon the Indians following through with money.