Although both are painted with a combination of blue and white, they differ in their dimensions and weight. Read next: Chamberlain B550 vs B750: Which … B750 is provided with a 3 … Powered by … The overall dimensions are 26.7 x 13 x 8 inches. The MED Lift System, the B510 has been … What we have here, with the Chamberlain B510, is a less fully-featured version of the Chamberlain B970 shown above, so if you're shopping on a budget it's one to consider because it offers the same Chamerblain quality, but at a lower price point. The Chamberlain B550 measures 18 x 10 x 6.5 inches and seems to be a compact device, whereas B750 … The Winner Is- A Tie. 1. Perfect for attached garages, its precision engineered for smooth, quiet performance you can sleep through. The Chamberlain Garage Door Opener B550 has been engineered that it had been encompassed the highest lifting strength, which better then ½ power class. The Chamberlain B510 features an ultra-quiet, durable, steel-reinforced belt drive. Physical Aspects. Chamberlain B750 is loaded with good features and hence does provide accessories along with the device which is useful for the consumers in the longer run. However, the B510 … Chamberlain B750. Although larger, it weighs less at 31.9 pounds.