@conFUcius -Just mounted my Power Tank and I can tell you it is not compatible since both brackets use the same soft top mounting points.
Was able to mount both the original (hard top only) Dominion Hi Lift bracket and the Power Tank JL 4door Sports Bar mount (driver side). Cheated the 5lb tank Super Bracket to be hanging off the bottom of the Sports Bar mount, and only used 4 screws instead of the designed 6. I figured the 5lb is about half the weight of the 10lb, and it's only mounted to the Jeep with 2 M8 screws, which are smaller diameter than the 4 3/8 screws mounting the Super Bracket to the Sport Bar. Also added the 10lb Sheeley Brace since the 5lb tank was mounted so low on the Sports Bar mount.