The B1 Lancer bomber was originally invented by Rockwell Industries in the USAThe B1 Lancer bomber was originally invented by Rockwell Industries in the USA
B1 Bomber
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It has 8 engines, four on each side, two per boom.
A B-52 has 8 TF33-P-3 turbofan engines
I heard it was somewhere in the vacinity of 250,000,000 Pretty pricey
The B-1B entered service in 1986.
B-52
The term "combat B1 composite" is not widely recognized in military or defense literature. However, if you're referring to the B1 Bomber, it's a strategic bomber that utilizes composite materials to enhance its performance and stealth capabilities. The use of composite materials helps reduce its radar signature and improve fuel efficiency. If you meant something else by "combat B1 composite," please provide more context for a precise answer.
B1 Bomber
Good aerodynamics and powerful engines.
Apart from the obvious increase in the number of engines, there is no real difference. The extra engines give increased thrust and thus additional "bomb" capacity. Depending on the role intended, a four engined bomber will be preferred as in a war, fuel is not a consideration.