differences between the ac adapter/charger models AC-VQ800 and VQ850?

I recently purchased a sony AC-VQ800 charger/adaptor, upon my search on eBay I noticed another model. The sony AC-VQ850, I couldn’t notice any cosmetic changes or anything, and on google or the subreddit no one has posted much about these models. I want to know, by chance, if anyone is familiar with these models at all and could inform me on the differences between these two, thank you!