Wouldn't x86 have the higher code density?

https://www.vogons.org/viewtopic.php?t=56207 "Finding an IA-32 CPU most like the MIPS R3000A"

"a 40MHz MIPS R3000 gets 18.1 MFLOPS, while a 66MHz 486DX2 only gets 3.1 MFLOPS. So, the MIPS is downright Pentium-class for floating-point code. For integer code, the MIPS R3000/40 manages a score of 22.6 in SPECINT89, while the 486DX2/66 gets 34.0"

So its also only "Pentium-class" for floating point math, not for integer.