BOJUZIJA Ergonomic Drafting Chair,Standing Computer Desk Chair,Foot Ring,Lumbar Support,Swivel Task Chair -Grey

What is the difference between the basic pink and the pink except a price difference of 50 dollars?

Reviewers mostly show pictures of a chair with a circular footrest but official description makes no mention of it - will it be included?

Is the height of this office chair adjustable? Is the installation of this drafting chair complicated?

I know it says 300, but would a 200 pound lady who is the correct height not really fit?