No, a bigger tank is not necessarily better for an air compressor. It all depends on how the air compressor is going to be used. If you need a lot of compressed air for continuous use, then a bigger tank will be better because it will store more compressed air and allow for more uninterrupted use. However, if you only need occasional bursts of compressed air, then a smaller tank may be just as good or even better because it will be easier to move around and won’t take up as much space.