No, anchovy paste is not as good as canned anchovies. The reason is that the quality of the anchovy and the way it has been processed will affect flavors and textures.  Canned anchovies are cooked twice to remove all bones and scales and make them into a paste. They also undergo specialized curing processes that give them a longer shelf life.  On the other hand, Anchovy paste is made by mashing anchovies with salt and then adding oil or vinegar to preserve it.  This means that the quality of the anchovy and how fresh it is will affect the taste of the paste.  Generally speaking, canned anchovies are going to taste better than anchovy paste.  However, there are occasions where anchovy paste can be a better option, for example, if you are looking for a lower calorie or salt alternative.