Of course, you have no way of proving this. I will tell you this: when it comes to issues like this, taste is based on opinion and opinions vary from person to person. One may claim that they have similar taste where they may not. Your friend may have put you under the impression that you may not like it, but you will never know until you have read it.
That said, since you haven't read
Venus, you have no way of
knowing whether or not you may like that book less than
HGTTG. You need to realize this, rather than make excuses. So, please. Come out from behind your "credible source" and read the book for yourself. Unless, of course, you're afraid of discovering what myself and others already know.