You may want to consider the Dutch and English components of the Aranea family of web-corpora:
http://ella.juls.savba.sk/aranea_about/index.html
Strictly speaking, corpora from the Aranea family are not comparable. They can be, however, used in comparative studies because of their (large and equal) size, equal technology used for their creation and annotation, and also their availability :-)
Best,
Vlado B, 13:30
-- Vladimír Benko
Slovak Academy of Sciences Ľ. Štúr Institute of Linguistics Panská 26, SK-81101 Bratislava
Tel +421-2-54431762 Fax -54431756