"Better" is a very, very subjective term. Be careful here.
All, well most, speakers do some things "better" than others. The same speakers may do some things "worse" than others. Good speakers are designed to do as much good as possible within price constraints.
Now, which way a speaker sonically tips the balance towards better or worse is a very personal opinion, one which a another's may or may not be shared by you.
The only opinion that matters here is yours, not the salesman's.
With speakers, I would go for the one that does the most good and the least poorly or, to put it simply, the one that sounds best to you. That one is "better".
Then again, "better" might apply to other non-audio related areas, such as meeting a sales quota.
Check out the store's return policy before buying and save all receipts and packaging should you decide they are not, in fact, better.