I love Trumpet players. I think Chet was smooth and appealing but Miles was a musical force. Miles had a broader range of outstanding work and is one of the absolute greats. This should not mean that Chet was not special.
In some ways, its kind of like comparing Jimi Hendrix and Stevie Ray Vaughan. I like them both, but Stevie would not have been Stevie without the presence and direction of Jimi Hendrix....
It was said before, its a preference but I celebrate all these artists.