Which Fuel Combination Had The Highest Specific Impulse?

• Which Fuel Combination Had The Highest Specific Impulse? by JoeFromRIUSA on 22 May, 2023 22:13
• UDHM/N204 or Lox/RP-1
• #1 by AllenB on 22 May, 2023 22:28
• The first reasonable looking source I found (https://www.researchgate.net/figure/Characteristic-data-of-typical-liquid-propellants_tbl1_225022069) gives the following:
  
  LOX/RP-1: 358s
  N2O4/UDMH: 342s
  
  Of course these will vary with O/F ratio, pressure, and other factors but this ought to be a decent comparison.