Something that ive always really wanted to know

Many a time ive been watching a boxing contest and seen 2 evenly opposed fighters trade punch for punch and the two virtually be inseprable on shots landed, thrown etc only for a judge to award the round either way.

For example, boxer A throws 54 lands 15, boxer B throws 56 lands 14 - Am i right in believing this should naturally be considered a 10-10 round as neither fighter gained on the other??