For the purposes of this list, they're the same. That isn't true in the real world, of course, and you'll find many models out there that bill themselves much more as "computer speakers" than hi-fi-oriented bookshelf/standmount models, but we've chosen the latter for this list for several reasons.
Firstly, and most importantly, hi-fi speakers sound the best. Dedicated computer speakers are often designed for gaming or to be used for a single use case, whereas proper hi-fi models usually offer greater sonic fidelity and insight thanks to their hi-fi heritage. That's not always the case, but it's true for the units listed above.
Second, decent hi-fi speakers should be versatile enough to hook up to your PC or laptop anyway. Most of the models above have USB and aux connectivity, not to mention a wider host of options such as HDMI, optical, RCA and XLR. That makes them flexible enough to serve as your laptop speakers or the centrepiece of a dedicated hi-fi setup.
Third - and this might be personal preference - but we find many of the speakers on this list just look and feel a lot classier than many standard computer speakers. The KEF LSX II LT, for instance, is a wonderfully made system, with two deeply handsome units that will enhance your home before you've even switched them on.