Smoke and mirrors.
Remember "Digital" speakers? Show me a human born with digital ears and I may buy it...
Any antenna with both VHF and UHF capabilities will do you just fine in an area with lots of stations. As a matter of fact, I am currently using an old set of rabbit ears in Sacramento and I get 30 stations. If I totally unhook the rabbit ears, I get 10 stations.. with nothing.
The Wingard Batwing antennas we all know and love have become antiquated now. They are heavy, (Relatively) a potential source of leaks
and you have to add a "wingman" Winegard Wingman for Sensar UHF/VHF improvement - $20.89
to make them more effective for the hd ranges.
Its the shape, and not the smoke and mirrors that make one style of antenna better than another for picking up digital stations.
I removed my winegard batwing last week, glassed over the giant hole and zillion screw holes and will either use the amplified antenna I bought and used in the desert last year or mount a JACK Aftermarket Antenna
where the Winegard was. This leaves me with the hole and potential leak equation, so I haven't decided yet. (The one a i got last year sits on a pole and I use thru the cable input .. no roof penetrations.)