never tried blue liner and although i have supertape, i have not tried it. walker contours so far have worked for me as well as st-30. left on 3-4 weeks-- 2-3 shampooings-- no lift whatsoever-- no residue of any kind left on lace. much easier to apply being contours and backing much easier to remove. walker comes off easier with 91% alcohol than st-30. keep in mind i have a real hairline so can't speak on exposing hailine with walker vs st-30.