It may be clearer to give the landlord such a simple explanation. Su 30, Su 27, F 15 are of the same level. If there is not much difference in avionics and other aspects, and each has its own advantages, it can almost be considered that it is difficult to distinguish Zhong Bo. Moreover, there is a key issue, that is, technical parameters. If horizontal comparison is not meaningful, there is still. The best models are F 15 and Su -27 series, not F 15 and Su -27, but their models, such as F 15SG and F65438. These three are roughly on the same line, and Russia has an advantage in professional air combat. In other words, if all of them are replaced by top editions, Su 27 is the first, followed by F 15 and F 16 eternal followers. That's about it. Maybe the landlord is still unclear. Simply put, you have to take a certain model. Su 27 is still making progress, so is F 15. F 16 is rarely improved because of its small potential. You can almost think that Su-27 and F 15 are equal. If Su 30 plays against the earliest Su 27 and F 15, Su 30 has an advantage in this case. If it is F 15E, it is a contest between Su -30 and F 15E. The reality is that F 15E is better. Although the Su -30 has a large bomb load, it has a certain impact on its air combat, and there is a certain gap between the ground and the sea and F 15.