I am really not seeing any similiarity between Hanso and Mikhail (Kelvin was Desmond's room mate at the hatch, not the eye patch guy). I am sure they are not the same actor, and I am pretty certain they don't intend them to be the same guy. Also I think Ben would know who Hanso is, and he seemed to regard Mikhail as a crazy ex-soviet communications officer who would shoot him if he didn't give warning before approaching his house. I imagine if we are ever going to learn anything of Hanso on the show, tonight may be the night for that.