I honestly don't know since I don't know what the specs would be for these pre builts.
But in regards to using Camtasia of all things for video editing, there are better free options out there.
Along with the exact models of these prebuilts, can you provide your overall budget?
And you said MicroCenter, so I assume you're in an area with one of those.
But MicroCenter has locations some different countries, so please provide budget in your native currency.
Overall for video editing, you get whatever is the best you can pay for.
The more powerful the CPU the better, this is definitely true for audio processing.
Secondly, adding a GPU into the mix if that is also within your budget will help with GPU assisted video rendering, but most importantly, CPU first and foremost. Worry about GPU second if you even can depending on budget.