I think it depends on what you are trying to do. The standard 1301 is the new darling of the 3 Gun crowd, and as you point out has a number of good features.
The 1301 Tactical/TX4 has one significant difference that for my use trumps the standard 1301 for defensive use -- the stock design and relationship of the aperture sights to the rail. With an H1 in a Larue low QD mount, the aperture sights and red dot are co-witnessed on the TX4/1301 Tactical, but not the regular 1301. It isn't the co-witness exactly that excites me, but rather the stock is optimized for using both the aperture sights and dot. Every other shotgun I have tried (Benelli M2, Benelli M4, 1301, 870 with Magpul or any stock) is set up for an optic or iron sights, but not both. That means the stock feels wrong 50 percent of the time, if you want aperture sight and optic capability. Since launching a single projectile Brenneke slug is my main use for the shotgun, and I want aperture sight and red dot ability, nothing else compared to the 1301 Tactical/TX4 for my use. If you really want to shoot 3 Gun or buck, the regular 1301 is probably the way to go.