The basic similarity between the Arrhenius and Bronsted-Lowry definitions are the production of the hydrogen ion (H+) and the hydroxide ion (OH-). Acids are known with respect to their ability to dissociate in water and produce hydrogen ions, which will combine chemically with other ions in the water. Bases are know with repsect to their ability to dissociate when mixed with water and produce hydroxide ions, which will chemically combine with other ions in the water. According to Arrhenius definition of acids and bases, the combination of an acid and a base will produce a salt plus water. According to the Bronsted-Lowry definition of an acid and a base, the combination of an acid and a base will produce a conjugate acid, or related acid, and a conjugate base, or related base. So their initial working mechanism is a shared similarity, but there is a difference of opinion on the product produced.