I’ll try to compare apples to apples this time from Boeing:
The biggest difference was in range and bombload; the 17-G actually had a higher ceiling.
B-29
Cruising speed - 220 mph
Top speed - 365 mph
Ceiling - 31,850 feet
Bomb load - 20,000-pounds
Range - 5,830 miles
B-17
Cruising speed - 150 mph
Top speed - 287 mph
Ceiling - 35,600 feet
Bomb load - 9,600-pounds
Range - 3,750 miles
ping