The Tu 16 had a completely different fuselage than Tu-4/B-29 because of his flying profile - with the "widebody" like Tu-4 you can't even reach the subsonic speeds in a diving flight without the airframe destruction. It was not larger ,but rather thinner with both engines almost integrated to it.
However, I completely agree with you - it was a milestone in a soviet bomber engineering , especially in a system development.
It was also a useless plane from the strategic point of view - you could barely reach targets inside the UK , not to mention the US (only in a kamikadze one way mission

). That's the reason why various adventurous plans like capture of american bases in Iceland or Greenland with invading forces transported by submarines were developed .
Back to the topic - the Spitfire easily beats others from the general point of view - great airplane, good combat record and a winner of the war