To compare you have to get into seek times and buffers as well. I can't do this for you but you would find the make, model drive, find the specs to compare with the other 7200 RPM drive.
Yes, it is possible for a good 5400 RPM drive to deliver better performance than a mediocre 7200.
I am considering purchasing a SONY VAIO I5 laptop, 15.5". I noted that they come with a 5400 RPM hard drive. Is there any significant difference between the 5400 and the 7200 RPM hard drives? Is the 7200 found in any reasonably-priced laptops currently being sold? Any recommendations?