No it's not. You present the tech of crisp, sharp, colourful visuals and say it looks better. Someone else presents the tech of cinematic, stylised, realistic visuals in a very different art style and says it's better. You look at faces with one shader and say it looks better. Someone else looks at a different face with a different shader and says that one looks better.
As the measurement for the tech is 'which one looks best to me', the discussion is subjective. The only way to have a pure tech discussion is either one-for-one feature comparisons (does game x have feature n of game y) and/or complete comparative GDC-style breakdowns of the engines.