Hi, The Ioniq despite being a 1.6 is little nippier, especially in sport mode, the Ioniq is returning between 63 and 70 mpg (now covered 3k) I own the premium SE which has every extra, lane assist, tiredness warning, distance control, cruise/limiter, full leather, but there is more refinement in the Lexus, lot less plastic. The ride in the Ioniq is a little harsher than the Lexus, the Lexus not so cramped. The radio/satnav in Ioniq is easier to use, has apple and android play, and a wireless charging system,
My previous car to the Lexus was a C class 220cdi Coupe Sport AMG line Prem+ and the Lexus suits me just fine.
Derek