NES vs Sega Master System? Genesis had more power, NES far outsold it. SNES VS Sega Genesis? Genesis had more power, SNES outsold it. N64 vs Playstation? N64 had more power, Playstation far outsold it. PS2 VS Gamecube VS XBOX, not only did the PS2 outsell its more powerful competitors, it also is widely heralded as the best console ever. PS3 VS XBOX 360 VS Wii, the weakest of the three far outsold its stronger competitors and the most powerful PS3 only managed to tie its competitor, which didn't have a name with a pedigree like Playstation.
Take it for what it's worth, but all of you people who are sitting there having orgasms over incremental performance differences between the XBOX and PS4 hardware really are out of touch with how little hardware power has factored into deciding each generation.