I have a 14 cf upright, and a 5 cf chest. Not really sure of the brands, I buy from a small local place it is the only place my parent ever bought appliances and I have just continued to go there.
Growing up we only had chest freezers.
I can tell you that no matter which style you get, you will put more in it than you should and nothing will be manageable. I bought plastic boxes at the dollar store for in the upright, it does make it easier to clean and defrost. But the chest freezer everything is at the bottom and you have no idea what is in there, with the upright everything is at the back and you have no idea what is in there.
If you vac seal a lot of stuff for storing, buy the chest, those bags do not do well stacking in the upright they slide around. I have had a couple times where I left someone put stuff in the upright that we sealed, and I walk out if I am lucky a few hours later and the door is open slightly. One or so of the bags slid and hit the door just right to pop it open some. that doesn't happen in a chest freezer.
No matter what, things hardly ever get rotated, we date and name stuff we seal up, and it never fails when we clean it out once a year there is all of the newly dated stuff in the front and the old dates in the back. I am not sure how to combat that, other than not putting to much in it.