Any of the above, as well as lifetime, ESR, ripple current and other ratings that come into play in specific applications needing those traits. If you grab the datasheet for several different series from the same manufacture it should tell you what the series is optimized for. In this application it shouldn't really matter, but if you were working on a switching power supply, motor inverter, aircraft instrument, battery powered device, something that will be potted in epoxy, has a very long life expectancy, will be exposed to very high or very low temperatures, needs to be very compact or other specialized application then you might want a part optimized for the traits that are important to the application.
Regarding the 105C requirement, the fact that the original part is rated 105C does not necessarily mean that a 105C part is needed, it simply means that the engineer who designed it chose that part, possibly on the "105C caps last longer" advice that often circulates around, or it could be what the manufacture had in stock, used in some other product that did need the high temperature it could be any number of things. In the absence of complete information I would advise going with something rated for at least 105C unless you are sure it will never get that hot.