Have you tried to visit this site?
http://bibleislam.com/index.php
its very reliable one and managed by Sheikh Yusef Estes as he said in one of his lectures I listened to
its a website that deal with Christianity from an Islamic view and refute the christianity issues that Islam came to correct like sons ship of Jesus Peace be upon him and his divinity
to be more sure, if you clicked on
About uslink at the bottom of their page, it will take you to Yusef Estes main website which is Islam Tomorrow
the site you mentioned in your first post looks reliable since members above confirmed that, will have a look on it inshaAllah