The main difference is that the B-29 was the first allied bomber with a fully pressurized crew cabin. The B-17 was unpressurized and the gunners were exposed directly to the airflow around the plane.
The engines were also very different and the B-29 added analog computer controls to many systems.
All throughout WWII.
It all depends on the pilot's instincts and control
Enola gay.
The plane was known as a B-29 Super fortress.
B52 B1B B17 B24
Enola Gay, B29 Superfortress
perhaps you mean the 'flying fortress' a B17 bomber
Boeing B17
Most powerful was the B29 Superfortress. For the axis powers, the Val dive bomber sank the most allied warships.
The B17, B24, and B29s were the heavy bombers of WWII. The B52 was the heavy bomber of the Vietnam War.
It was the Flying Fortress, dubbed so by a Seattle journalist and later adopted as the official name.
On August 9, a B29 bomber aircraft dropped an atomic bomb on Nagasaki. Six days later, Japan announced its surrender, ending their involvement in World War II.