As mentioned previously, the digital signal is NOT directional at all. It is transmitted in a nearly 360 degree pattern. However, the Batwing antenna IS directional and it's even more directional if you add the Wingman attachment. Generally, all of the local TV programming comes from one general area (the high ground) but that's not always the case.
The Sensar (Batwing) is considered to be an antenna capable of receiving a signal up to 60 miles away. This can be substantially more or less depending upon geographic conditions and requires the antenna be pointed correctly for optimal reception (thus the Sensar Pro).