Slightly disagree with the 'both are memory' -portion. Hard drives on computers are seldom treated as 'memory' (excluding the temp-portion). The 16-32-64 GBs should be treated as 'strorage capacity' to avoid misunderstandings.
But there's nothing you or I can do about it, is there?
Does matter, they both are memory. When you turn your computer on your data is there because it is stored on memory. The routines that tell your computer, your phone, and the iPad how to start up are stored in ROM, which means read-only memory (though even these can usually be changed using special procedures and electronics, and such). When we refer to the 1GB of RAM the iPad has, we mean random-access memory, which is volatile. When you burn music to a CDRW, CD-R, DVD-R, DVD-RW, etc, those are all other forms of memory, and non-volatile. Flash drives, SSD are all forms of memory. Some memory is used for temporary uses (RAM) and other for more permanent uses (storage). All users may not understand the terms (nor do they need to), but the terms exist for a reason and the world isn't going to stop using terms because some people may get confused (all technical areas & industries are just full of jargon). Some stuff is important mainly for marketing, others for engineering. The worlds collide at some point. We muddle through.