A two part question, first, on US web site, row 22 on an A321 is shown as an exit row, but SeatGuru shows row 21, I am assuming the US site is correct?

Second, is row 22 (or 21, if my previous assumption is wrong) about the same size/leg room/etc, as row 26 on a 757? US is using A321's for my upcoming PHL-LAS flight, I am used to arriving early and snagging row 26 on a 757 most every time, but I want to make sure I ask for the row I really want on the A321. Thanks...