
Crazy to think that Russia is gonna deploy their second 5-5.5th Generation Aircraft before the AMCA.
@Hyperactive ADD was right, apart from the Americans, no country can compete with the military industrial complex of the Russians and they are more pragmatic and realistic than American's in their approach. I felt that Russians were better Aircraft makers than American's for quite some time but people tend to confuse the affects of the collapse of the Soviet Union and their lost decade on their industrial complex as somehow a lack of their capability which is obviously not true.
Su75 Checkmate is Russia's first single engine aircraft and I like it for a lot of reasons,
The control surfaces on the Su-75 is quite unique - or maybe even revolutionary! It would be interesting to see what effect the extreme angle the inner flaps would have on aerodynamics (esp maneuverability). The beaver tail is yet another quite unique innovation.

Makes sense since the Russia's Su57 was the first to employ a lot of things like Levcon's which other 6th gen designs wanted to copy, Russia is simply ahead of the curve than everyone in this matter. Not to mention the multiband arrays and such.

First jet after the Americans and Chinese to employ Diverterless Supersonic Inlet with performance optimal for transonic speed which is the critical range of speed used in operation like air combat and high speed low level penetration. The intakes also being close to the nose will prevent a well developed boundary layer from forming and hence the intake will encounter a thinner boundary which will make it easier for the DSI to divert low energy air before it reaches the engine, this seems like a good design compromise.
The Su75 is everything the F35 was supposed to be but failed at doing so, Su75 will be a low cost stealth jet which will be relatively cheap to procure. From what I can gather here and there the competition might be completely overwhelmed and in shock when they see the price tag. They won't believe it or it's impossible or it's just an outright lie! It is even expected that operational cost per hour of the new Sukhoi fighter will be six to seven times lower than that of the F-35 and for the price of one Indian Rafale buy eight to eleven of these while it's a generation ahead. Even if the checkmate costs twice as much as expected, judging by the price to operate them, it's a bargain for everyone.
The Su75 has 30% range than F35, almost similar weapons payload capacity and able to carry 5 BVRAAM missiles in stealth configuration, higher service ceiling, It will also feature an open architecture to integrate non russian systems, it will also probably have a multiband array for stealth detection, an EOTS system under cockpit like F35 and J20.

I would like to hear other's opinion as well.