Agreed.
A few of my friends have S4s now, and playing with an S4 side-by-side with my One, there's nothing substantially better about the S4. You pay more for the S4 in most cases, especially if you are getting a new microSD just to match the One's 32GB.
The S4 you should get if you want a big battery like Zero Lemon's 7,500 mah one, but there are also external batteries that will work with most phones with even larger capacities. If you absolutely need more than 32GB the S4 is a clear choice.
I much prefer having aluminum body (I go caseless), front facing speakers that are exceptional for a phone, better low light camera shots, more onboard storage (25 GB free versus the pathetic 10 GB in entry model S4), Sense 5 which is practically as fast as GPe and with less feature-bloat than TouchWiz, 468 DPI on a beautiful LCD display, genuinely useful camera features like Zoes and Highlights, the $25 play store credit (don't know if that promo is still on), and a really good infrared sensor and universal remote app (S4 has one, too).
But you should definitely get the S4 if you want to wave at your phone. (don't get angry at me making fun, blame the hundreds of millions of dollars Samsung spent marketing that feature)