[Al Skierkiewicz]

Maju,
Many of the branded batteries listed are actually the same (manufacturer) battery with a different name printed on the outside. All batteries on the list fit the same physical size and power output. If you examine the spec sheets and find differences, they are usually in the way a particular manufacturer runs the specified test.
For instance some manufacturers test the AH rating at 1/10C current while others may do it at 1/20C to make specifications look slightly better. If you look at the current at specified loads they are generally very close in ratings.