HOG/Edge - D1x, D2, D3
Deep 6 - (DGX Gears D6), Excursion, Signature
The above are equivalent configurations between the two brands: compact turret, fixed ports, long turret
There are differing "grades" between the D6 line, differentiating performance (slight), surface finish, included parts kit/service), etc.
Both support end user service if that is of interest to you, with different models to "ensure" training.
HOG kits are available retail to the end user, manual is restricted (requires a class)
D6 manual is available to the end user via download, parts are (somewhat) restricted (requires a class)
Cant go "wrong" with the ScubaPros that
@BoltSnap listed, but US prices are notably higher and if you want to do your own service, you will need to creatively source parts.