The verdict is in and I must say that I am surprised.
With a new pair of Simms Rivershed wading boots I applied 2 different type of cleats to the boots. On one boot I inserted the Simms HardBite 'Star Cleats'. On the other I used grip stud brand cleats.
After a little over 1 year of use I decided it was time to tune up the boots. What I found was this.
All cleats were still on the sole of the boot and showed little wear. However all were a bit loose and so I retightened them and added a few more for an even better grip.
Grip Stud Brand:
Apparently 4 of the studs were lost! What is even more disturbing is that when the studs pulled / scuffed out, they leave a somewhat gaping hole where they had been inserted. This makes reinserting replacements into the same location a bit dicey.
I fairness 'if' you were to lose one of the Simms Star Cleats, there would no doubt be a stripped out hole where the retaining screw had been as well. The point of these results is that 'None' of the Simms cleats were lost.
Another point noticed is that the Grip Studs have a higher profile when inserted and initially this seemed to provide a superior grip while wading. The higher profile is possibly the culprit in the eventual loss of the studs. The remaining studs did appear to be in good shape considering wear.
Without bias I must say at this point that the Simms product has proven to be more resilient and as noted, they are showing little sign of wear.
The Simms product development team seems to have hit a home run with the HardBite Cleat. It will however be in your best interest to inspect your boots for loosening of your studs or cleats periodically.
Had I done a spring 2013 or fall 2012 inspection I may have found the loose Grip Studs and been able to avoid their loss.
You can view / read the original review here > A Very Timely Test & Review of Grip Studs