Nope, and I'll tell you why.
I got the Hero last october, coming from a Treo700wx. The experience of using the Hero was lightyears ahead of that. Customization, apps, everything. It was because of the Hero that I became a phone hobbyist.
The Hero basically uses bottom of the line hardware. Little processor, little memory, little rom, little screen. Honestly the only functional thing I miss about the Hero is the trackball. The EVO is double every internal spec of the Hero, and the 4.3" screen is gorgeous.
Since they use the same physical size of battery, I use my hero to charge up its battery as a backup to the evo. One time I accidently turned it on and scrolled through it...I literally lol'd at how small and puny the hero screen was next to my evo. I don't know how I ever managed with it, I probably aged my eyes 10 years by squinting at that tiny screen.
With the Hero, I was constantly running into low memory errors because I had so many apps installed (around 80). On the EVO, I have about 150 installed and no problems.
The Hero is the EVO's little brother. The Hero was a good first splash into the market but its end-of-life now. Its not going to get Froyo, which EVO will. EVO also has the specs necessary to get the gingerbread update.
Games are completely different on Hero vs the EVO. Hero is good to pull off tetris-style games. EVO is going to give you full 3-d game experiences.
Then theres other things like the kickstand, HDMI out, FM radio etc as the cherry on top.
This is an easy $200 to spend. You can maybe make half of that up by selling the hero on ebay.