No real knowledge about the these two bikes and I build up my bikes myself, but I prefer to buy my frames and parts from the LBS. I'd rather get to know the guys I buy my parts from, pick their minds on tips, parts and bike set up. But there are some good deals online and some are hard to over look.

Best suggestion I could make is do a lot of research.
Spec your body and get a frame that fits you... have the LBS or a friend measure your inseam, arm, torso length, etc. Then research frames that fit your geometry and the style of riding you're into. Next do some research on the frame manufactures you have narrowed your choices to. Make sure they stand behind their frames, see what their warranty has to say and check into the company history.

Next do a few google searches for the frames you're interested in. Search for (frame manufacture+cracked) (frame manufacture+broke) (frame manufacture+customer service) this should reveal any issues the frame manufacturer is having with the frames you are interested in. If you find a lot of issues... mark that frame off your list and move on to the next. This will help you drill down your choices in frame selection.

I'd avoid Google searches for (frame manufacture+suck) (frame manufacture+crap) I found that a lot of people spin tons of negitive hype about frames and parts. They tend to use words like "suck, lousy, crap, junk, etc". Don't get caught up in negitive hype.

Keep drilling down your choice until you find two or three frames you really dig and then keep drilling with Google searches for (frame manufacture+happy) (frame manufacture+pleased) and see what kind of positive stuff is being said about the frames you're interested in and what kind of riding these people are using the frame for.

I'd avoid Google searches for (frame manufacture+best) (frame manufacture+great) I found that a lot of people spin tons of hype about their frame choices and they tend to use words like "best and great". Don't get caught up in the hype.

Be very selective in your search results, if someone says a frame is great... read about their riding style, what type of trails their riding, see what kind of previous bikes they had... their previous bike could have been a Walmart special. There is a ton of hype and bad info that is misleading, but with some time and research, you'll be able to spot a kook a mile away and find the knowledgable info you seek.

I've spent up to 6 months researching frames in this manner for the past three years and couldn't be happier with most of my choices in frames.

Here's a website that has some info on measuring up your body to bike fit, but a good LBS will be able to do this for you too. Be sure to have someone measure you... don't try it yourself, or you'll most likely get inaccurate measurements. This worked well for me... I wish I had spec'd myself long ago!

http://bikefitting.com/English/Frame.aspx

Finally... with some heavy research, I think you'll find you not only get a bike you really dig, but you'll also find you enjoy your ride much more. I had issues with my back aching for years and had to stop riding for two years when I was 34 because of a herniated L5 in my back and spent 8 months doing intense physical theropy twice a week. It's a strange place to find yourself riding like a there's no tomorrow and the next day walking with a cane. I remember days when I had no feeling in my right leg and had to use cruches just to get around. But with a lot of physical theropy I was finally able to walk again without my leg going numb all of a sudden and failing over. So, I bought a bike off one of my buddies to ride in the neighborhood, I never thought I'd be able to ride as hard as I did before the injury. I'm 41 now, the L5 has healed, but not completely... however with a proper fitting bike and continued physical theropy most of the back pain has gone away and I'm riding stronger than I ever have. More important... I'm enjoying my ride more than I ever have in 17 years of riding.