I bet you wont change your travel settings if you get the Transition. The downhiller inside of you is going to be all, "OH BOY! 7 inches feels so much better than 6 inches" and you will keep it locked on the higher travel setting permanently.
There is soo much more to a bike than just travel though. Head tube angle, swing-arm design, etc.
Do me a favor before you end up buying a bike: Go to a Transition shop and ride one and have the sales guy tell you want sets the TR250 apart from all the other bikes in it's "mini DH bike" category. Then do the same thing at a Trek shop.
Make sure that when you go to the Trek shop the sales guy tells you about these things about the Scratch:
ABP (Active braking pivit.) Full-Floater Linkage. E2 Tapered Head Tube.
But when it all comes down to it, you should buy the bike that feels best for you.
I Agree, go to a shop and ride both bikes. In fact ride all the bikes you are considering, and maybe even a few other Mini DH bikes that you aren't considering, for instance the Scott Voltage FR. I haven't ridden the TR 250, but it looks sweet. I have ridden an SX Trail and a Scratch back to back, and I preferred the scratch. I felt that it fit my body way better than the SX Trail. The one bike I would love to take for a spin is the Voltage FR though, it has a way low seat tube which makes it much better for jumping, tricks and corners. Plus it has adjustable travel settings for the stock shock to swap it between 180mm and 160mm. On top of that they made it compatible with a smaller rear shock that will put it in the 150mm or 130mm travel range if you prefer. Basically with two sets of suspension you can make the frame either a mini dh bike or a slope style bike, which is cheaper than have two separate bikes.
Just an idea, the best thing you can do for yourself is to ride as many mini dh bikes as you can, since each company has a unique idea of what makes a good mini dh bike, and there own idea of what the "average rider" looks like. Find the bike that fits you the best, and you'll kill it everywhere.
And if you can find one used, a Commencal Furious is a great bike. I just got one used a few months ago, and build it up. It's the lightest 180mm travel bike I have had (though not the lightest bike in this category) and it's got great geometry. In a nutshell it descends and corners way better than my Kona coiler ever did, and it jumps like my dj bike, and the only change I make to the bike is the seat post height. And on another note, Trek doesn't make the scratch anymore, so you may have to buy a used one there too.
If you have to buy brand new, then I would get the TR 250 or a Scott Voltage. But ultimately, it depends on which one feels the best. If you can't find those two near by, try finding bikes that are made by the same company, chances are if you like a Transition trail bike over a Scott trail bike, you'll like the 250 over the Voltage.
What about the Santa Cruz Nomad Carbon, with a 180mm fork? (SC say this is ok to have a 160-180mm fork)? Head angle would be about 66°. This would keep things fairly light, plus SC say it's their stiffest frame up to now.
Man, dead thread as AM bikes & the geo are so capable these days. I still think the Knolly Delirium is THE freeride bike. I sure do hope they re release.