ridgid, ryobi and milwaukee have the same parent company.
ridgid has a lifetime warranty called lsa that you sign up for, otherwise it carries the 5 year tool and 3 year battery warranty like the other two brands carry. that gets the warranty out of the way. i like spending one time on my tools and not keep feeding the machine dollars as the batteries need replacing. been there, done that. ridgid batteries sold outside of a kit are limited warranty of 3 years like most everyone else. they can only be charge so many times is the key factor so the more you use it the faster they need replacing. i alos enjoy customer satisfaction when i need batteries or repairs. you can take it to small authorized service centers and they do it up and for free. they change parts that aren't broken and upgrade batteries because ridgid improves on them so they give new improved batteries as they are released and your in need of them.
next is power. the milwaukee is the only drill i'd use on that brand and size bit by itself. make sure it's this years version if you go milwaukee because the aux handle has been breaking their gear cases and they supposedly made improvements to that issue. you won't be using the plate off ice for work or projects and people have been getting injured with prior models.
a clam plate is not a gear box conversion, ice kicker 2 is. so if your going plate, then look for them on ebay and then you can use about any drill and bit you'd like.
more current talk of drills
https://www.iceshanty.com/ice_fishing/index.php?topic=359847.0