Was struggling between these two before. But I guess picking a ChargeMaster Lite to start with would not be a bad decision.
It is accurate enough to let you shoot tight groups. If you do want to get more accurate, a manual trickller will be able to help to dispense the last 1grain of power by yourself after ChargeMaster. And you can always have a spare powder dispenser in case you want a high end one later.
But if you insist to pick one of two, for me, I will get the MatchMaster, it is pretty much in par with AutoTricker v3 on accuracy test/reviews done by 3rd party(even the advertised accuracy is 0.04grain, AutoTrickler v3 is 0.02grain) and it is all in one device, can be used out of the box, you don't need to make any changes/adjustment like AutoTrickler does when you set it up. As there are more upgrade parts for the AutoTrickler, so you might end up with a $2000 powder system.
I would prefer to save the extra 1000CAD on training or ammo for now or get a more accurate reloading press and/or dies or save some money for an AMP. If I do need a 5 times more accurate scale/powder dispense system, I will see what's available on the market at that time. You might see a new product on Shot Show or new version of AutoTrickler. Plus current lead time is about 2-3months for AutoTrickler v3. AutoTickler v3 does win my vote on speed, but I am not reloading 500 rounds a day, so time is not that critical to me.
Just for your information, if money is not an problem, Prometheus is the one you want,
https://www.prometheustoolcorp.com/
Edit:
Found a couple of videos on youtube I watched, thought might be helpful.
Another review of the MatchMaster:
https://www.youtube.com/watch?v=XHEdn0WqdwY
AutoTrickler V3 vs ChargeMaster Lite...Surprising Results!
https://www.youtube.com/watch?v=-TawWi5US7I