JoshTPDX saidI have the Samsung Galaxy S Vibrant (i think it is a clone of the AT&T captivate).
After using it for about a year here are the things I wish I could change. If the HTC is that similar and can solve any of these problems I would go with the HTC (assuming these problems below matter to you).
The camera and HD Videocamera are excellent and take amazing quality shots...in natural light.
1.) Camera has no flash.
2.) No front facing camera so video chat isn't possible and self pics are challenging.
Any aps you want to run that require a GPS signal will be wonky. I run and my endomondo app works on everyones phone perfectly. On mine the tracking is way way off.
3.) GPS is very inaccurate. (in fact when i went into Tmobile to see if they could fix it they told me to wait for the HTC to come out!)
I moved from blackberry to droid and still miss my flashing front light that would tell me if I had a text, email, phone call without needing to turn the phone on.
4.) No flashing notification light.
Ultimately, the biggest draw back to the Vibrant and its class is its selling feature. The screen is amazing! Like really, really ummm i guess "Vibrant" lol. But it also drains the battery like crazy so I almost never have it on full brightness. Even without a great screen the battery life is lame. I can't make a full day on a charge and need to have a charger at home, work, and car.
5.) TERRIBLE BATTERY LIFE
hope this helps!
I have the Galaxy S 4G from sprint, and I love it. I don't have any of the issues listed above, except #5: Terrible battery life. But any of the high-end smart phones are goign to have really bad battery life, and with the Galaxy's super bright screen, there's going to be a trade off, but I haven't seen that as a problem. I just have an extra charger at me desk at work, and one in the car, and I keep an extra charged battery in my courier bag (but I never have to use it).
1) My camera has a flash, and there are multiple settings with the flash. The camera software is remarkable as well. Pretty much like a 3mp point and shoot.
2) Front facing camera, but doesn't have all the settings of the regular camera.
3) I use my GPS for my hiking, mt biking, and road biking, and it pretty much maps out the same course as my Garmin. No issues with the GPS. In fact, I used it for geocaching once, and it got me to about three feet.
4) There is a notification light, and you can customize your notification methods. Also a notification bar is available that will tell you everything you have waiting across the top of the phone.
5) I am with you on that one.
I don't know why there are so many differences between the phones. Perhaps it's the carriers. Mine is Sprint....Epic 4G.
I hope that helps.