power and comparison of gps processors

Good morning all,
are there any databases concerning comparisons for the powers of the processors running Garmin gps?
we find these comparisons for recent phones, but I have never read anything about these gps, is the 66i more powerful than the other models in this 66 range?
ditto for the Oregon series for example, I have a 750 and I tried a 600 and I had the impression that it was less efficient, or in comparison is that the 700 is less powerful than the 750 as it is there anything to manage the camera?


Can touch screens also reduce the performance of the device?


I was wondering since the maps are more and more complete and the information to be displayed more important.


thank you for your information if you have any