Rockwell ?
Having flown the Rockwell 114 quite a lot and also the TB20 I have found them both very good aircraft ( I have a slight preferance for the R114) but you cant slide a cigarette paper between the two of them on performance.
Both types will forfill VMC-on -top's mission requirement very well in all respects except economy (or short field performance) .................. Oh dear! I think it is still the Robin that makes the grade in ALL the mission requirments.