On the outside, anyway; her finish inside was very rough, according to reports after her capture in Wassaw Sound. I don't know that she was refitted to be a bit more habitable in Union service, but I suspect she was.
In concept yes ,in design no. The Atlanta was constructed to the plan of Clarke and Ivens small Mississippi adapted to fit the hull of a merchant steamer( see my earlier thread on he ironclads of Nelson and Asa Tift.
The Albemarle was a John L Porter diamond hull design.