Probably not that many, then.The easel pads have 50 sheets that fit my table, I can flip through multiple maps at a session, and when I'm done they all stay together and store quickly under the couch. What are the advantages that gaming paper would have instead?
You can get gaming paper in rolls (think wrapping paper), which is a double-edged sword. It lets you get exactly the size you want, but is hard to reference if you leave it on the roll.
The pads are more, smaller sheets than you're using there. If you tend towards a lot of small or cramped battles, it'd probably be more efficient.
It also does come in sweet background colors. Which isn't that big a deal, but does a nice job of setting tone if you have a few different options.
I probably wouldn't worry about it unless there's a big price difference or you find you're wasting a lot of space, though.