Honestly, if you plan on doing casual scripting, and not too large of a script either will work. If you need something with a speedy responce time, then hash tables are your best bet.
Ex:
Having a seen script that you would like to search through hundreds (if not thousands) of nicknames looking for a date when they were last seen--definalty a hash table. If you want something that is going to store a very minimul amount of data, just use variables.
