probably not.
unless you encounter a 7200 in the future, but there are other factors that
can affect whether you notice a difference or not. It is very hard to
actually be comparing apples to apples in different laptops, unless they are
almost identical in specs except for the hard drive.
Yes, 7200 is obviously faster than 5400, but if something else is slower
than the other laptop, than maybe you wouldn't notice any difference at all.
Get the one you like, and can afford.
Jack Talsky