They are all meant to be the same, but have to be slightly different to avoid lawsuits.
The washer under the drive side locknut doesn't get on well with certain tool/ lockring combinations
But if you can hold the tool on there with a long bolt then it will come off.
Another problem is the habit of torqueing the lockring down like its a fixed lockring. even the recommended Torque is way higher than needed - but this makes removal a challenge if the tool can't be easily inserted and held in there.