I see that the 12V are LI Ion batteries.
I had/have 18V DW tools. When I stopped using them DW didn't have Li Ion batteries available. The Ni Cads were junk; no staying power, short longevity and excessive replacement cost. I could buy a charger and "one" battery cheaper then a single replacement battery. This combo was probably the most economical way to go since I had two chargers go south, also.
It has been over 10 years since I packed away the DW's. Maybe they have finally gotten their act together. A quick research on the DW batteries shows 18V Li Ion batteries are now available. They weren't when I was using mine. However, the batteries are $100-120 EA! In addition, I would have to purchase a new charger, again (replaced two previously) to charge the Li Ions!
When I made the decision to not pay for bad batteries anymore, I switched to Ryobi for lack of a better alternative at the time. I have been more then happy with their performance with the Li Ion batteries. I just purchased two Li Ion batteries for $99+tax. This is half of the price of a comparable 18V DW. I didn't need the batteries, but the ones I am using are 3-5 years old. Like DW they are only warrantied for 3 years. So, the purchase was an "anticipation" purchase.
Again, I'm not criticizing anyone who uses DW, or any other brand. I just made a decision 10 years ago not to have my wallet held hostage by poorly performing batteries. Not everyone has the finances available to own several different brands of battery powered tools, batteries, and chargers. Therefore, most of us have no knowledge base to make an informed evaluation, based on personal experience. Most will stick to one brand as a matter of economics. Since battery powered tools became prevalent, I have only owned two brands...DW and Ryobi. I made a decision to try the Ryobi's and as of yet, have not had one cause to regret it. Others will have to provide pros and cons on their Rigid's, Hitachi's, PC's or whatever.
I do not use my tools commercially
! I use them for hobby and home use only. However, they do see a lot of use. Sometimes, some VERY abusive use. I am still using my original 3/8 drill which is my first go-to tool and sees the most use. Are the Ryobi's junk? So far, I haven't seen any evidence of that. Would they hold up to commercial use? I'm not qualified to say. Am I happy with them so far? YES.