Both Redline and Diamond Back have/had full lines of bicycles that range from economy to pro.
Also, what era of Diamond Back are you talking about? Diamond Back used to be owned by WSI. That company went out of business and the brand was sold to Raleigh. The brand was completely missing from the market during the 90's until Raleigh resurrected it in 2003.
Redline, on the other hand, has a bit more of a history than Diamond Back. Diamond Back started out in 1986 just because someone over in Taiwan shipped WSI a shipment of Raleigh frames accidently. Raleigh felt that the freight to ship the frames from WSI to Raleigh would not be worth it, so they told them to keep the frames if they would just be so kind as to peel the stickers off. This got WSI interested in importing bicycles.
Redline has been around much longer. Started in 1970 by Linn Kastan (of Kastan, manufacturer of Kastan and Hoffman and designer of Giant's MOSH frames as well) and Mike Konle building motorcycle frames. In 1974, they started making BMX bikes.
Now, if we're talking current models like Diamond Back's top of the line Reactor Pro ($650) vs. Redline's top of the line Flight Pro ($1200)... well there's no comparison. The DB has a Cro-mo fork, the Redline a carbon fiber fork. The Redline has hollow axle hubs, Sun Envy rims and classic Flight crankset. The DB isn't "bad" though. DB just doesn't make as high end of a bike as Redline. The DB is nice with it's Alienation rims (no spoke eyelets, though) and FSA crankset, but it's no Redline Flight Pro. :-)
Yes...the grind is in the lower class of the Diamondbacks.but it is better then the Goose Spin.
Diamondback bikes come in many sizes and styles and can start as low as $130 for a little kids bike on up to almost $5K for a top of the line mountain bike.
Saracen is a far better make Especially with their 2010 bike
A hyper is better
The Mach bike is better because it is faster than the other bike; but if you like messing around and doing tricks then the other one is better.
It is a heavy bike ... so what is the real question?
100 cc bike has better mileage than 150 cc bike due to its engine power big engine consumes more fuel than the smaller one.
a fit is better than a Sunday
They are pretty comparable, quality wise.
Snowboard because its better than a dirt bike.
ktm is way better than Yamaha........ the ktm 85 sx is probably the best bike in the world
there all junk now days so whatever is the better price go with it