Scotty,
I've done Pike's Peak twice, and it's an incredible hike. It's nothing like Whitney because you have a Disneyland-type of atmosphere at the summit, with restaurant, flushing toilets, souvenir stands and parking lots. There's a road going up to the summit and they used to charge you $10 a car just to drive up there. As for hikers, there's not a lot of solitude on the trail either. On the way up the Barr Trail there are A-frame houses, "Barr Camp," which has an outhouse and people living there and many other signs of civilization.
The cog railway only runs at certain times, so you'll have to check and buy your ticket *before* you try the hike. It's not like the Palm Spring aerial tramway where you can do San Jacinto and if you're tired, just buy a ticket and glide on down. The cog railway might stop running at 6:00 pm (just a guess) and if you summit after that, you'll be out of luck. Also, watch out for the afternoon thunderstorms, which are severe in Colorado. There's even a warning sign at the beginning of the Barr trailhead about these sudden storms.
The trail conditions are much, much better than Whitney. A lot of it is over smooth trail, no rocks, very nice. It's steeper than Whitney, but there are also some sections of no elevation gain for awhile. Watch out for August 17, that's the day of the Pike's Peak marathon and no one can hike on that day, just the runners. Best of luck to you.