The Guess Who is a Canadian rock band, formed in Winnipeg in 1965. Initially gaining recognition in Canada, the group found international success from the late 1960s through the mid-1970s with many hit singles, including ''No Time'', ''American Woman'', ''Laughing'', ''These Eyes'', ''Undun'' and ''Share the Land''. The band has continued to perform and record to the present day; and at various times has included many well-known musicians, including Burton Cummings and Randy Bachman (of Bachman--Turner Overdrive). Formed as a garage rock band, their musical style encompassed the pop rock and psychedelic rock genres.

Can we conclude that are the who and the guess who the same band?
no