There is no doubt that Russia is in constant upgrade and buildup of its armed forces. Technologically, new Russian weapons systems are thought to be on par with that of the US. Su-33s and Su-35s are, in fact, superior to US counterparts in terms of thrust-to-weight ratio. This means that, in a dogfight, Russian jets would easily eliminate US fighters. That is, of course, it would come to dogfights. US jets are so designed precisely to eliminate the need for dangerous dogfights. For instance, stealth technology, new radars, and missiles enable US jets to kill enemy aircrafts before a visual is even made.