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Originally posted by Kr0n0s
From what i understand, like the above poster mentioned, the Su-30 is its most likely competition.
A bit off topic here but Ive also read that this may be the last "manned' fighter designed and devoloped. The next break through, which is probably already under development, could possibly be an unmanned fighter (UAV) where the "pilot" is actually setting in a comfortable gaming chair thousands of miles away with a red bull and hot pockets on his desk lmao.