The Winegard HD769xP antennas tend to get more gain in less space than the similarly sized AntennaCraft HBU-xx antennas.
For example, the boom length of the HD7694P (
pdf data sheet) is 65" while the boom length of the HBU-33 (
pdf data sheet) is 85", yet the HD7694P has about 1-2 dB higher gain on both high-VHF and UHF bands.
The HBU-22 (
pdf data sheet) has a 70" boom length, making it about 15" shorter than the HBU-33, but the high-VHF gain drops quite a lot (about 3-4 dB lower). Yes, it's smaller, but for a relatively small drop in size, it's losing quite a bit of performance.
So in other words, the HD7694P is actually shorter than the HBU-22 and has better performance than the HBU-33.
It is also true that the Winegard antennas are very hard to fold back down after you've snapped the VHF elements into place. If you really need to fold the antenna again, be careful with this one.