The difference is the batteries used is implied a lesser quality of battery. Look up E-Bikes. The differences are in there. Weight/torque/battery milliamp hours etc…
So when I used the lesser home made kit. It is acceptable. When I use the better kit. The tools are considered better quality and the over all work is neater. Cleaner. Better. Faster…stronger…and you maybe able to have fine tuning and precision.
What exact tools? Jesus dude, go to a tool shop and ask a few question. Some stuff is just made with better quality. Take a ratchet set I just picked up recently. Walmart sells at $20. Bigger box store has a better quality steel one at $80. If you didn’t know the difference in steel, you would be screwed if you had to rely on those crap tools.