Of course, there's also the thing where Washington was the first US president and Lincoln was the president who took the first huge step toward racial equality (as well as being the first sitting president to be assassinated). That could have had some influence on their choice as well.
Here's something you should know: the George Washington flash drive is a very limited edition. They are making only 1,000 pieces, each one hand-numbered, so if you want one you'd best move quickly. Abraham Lincoln will be in production for a good long time, so if you have to choose between the two, I'd go with Washington first.
As always with MIMOBOT flash drives, these aren't just for storing your data. They come with the full selection of icons, wallpapers and avatars you've come to know and love. To access the USB portion of Washington, simply remove his tricorne hat. To access Lincoln's USB plug, you have to remove the top of his head (which I have to admit I find a little disconcerting especially considering he was shot in the head, but so be it). Each drive features a replica of its respective President's signature across its back. Pricing ranges from $19.99 US for an 8GB to $129.99 US for a 128GB drive regardless of which style you choose.
You know what I love about Mimoco? I mean, other than the obvious fact that they make a bunch of different flash drives I can't help but need? Even though the Washington drive is a limited edition, it's still the same price as any of the rest of them. You know they could easily jack the price up and no one would even bat an eye, but they choose against it. I think that's neat.