Decisions... sorry-more bike stuff

I'm assuming the Dual is the slow blue Ultegra 10 model at that price, means a much better component group than the 105 on the other bike, sounds like the better deal if you need the wetsuit.

By the way, I'm pretty sure carbon seatstays are not an aftermarket add-on.

First of all, you and The Bear look like you're related to one another.  Secondly, I'd go with the better components.  Both framesets are solid.  But, the Ultegra compoments are the drive train, the heart of the bike, and will figure in greatly to your performance and the life expectancy of the bike itself. 

By the way, I think you meant "cabon seatpost".  If it came down to Ultegra vs. better pedals and seatpost with 105's, I'd definitely go Ultegra.

I don't know about the Cron'Alu being comparable to a P3. The Crono or maybe even the Trilite if you're comparing Al to Al, but the Cron'Alu looks like a match to the Dual. I'm personally partial to the Dual myself (maybe because I ordered one), but for the price I'd say it's a tossup. The wetsuit though pushes me back toward the Dual. But if you really want to follow in the Bear's footsteps go with the slow one.

To aleviate my curiosity I just did an experiment which turned out to be useless, but for the effort I still want to share

I ran a basic search and found an Ultegra 9 speed upgrade package for $620. The only Ultegra 10 group package I could find was $1020 w/ a wheelset. The only 105 kits I could find were $800 with an added wheelset, bar and stem. For a simple thread reply I'm not going out and pricing all the individual parts However it was so hard to find an apples to apples kit comparison for the price I just gave up...

So depending on how you look at the pricing, the upgrade might be worth it. Take a hundred bucks off the 105 to account for the bar and stem and compare apples to apples with the ultegra 10 package, and you've got a $300 difference right there. If the wheel upgrade is worth another $100, and throw in the wetsuit, you've got a definite deal on the Dual.

I haven't heard too many complaints about the 105, Tigra yes will let you down. The 105 is usually where people go when their Tiagra failed on a key hill. Everyone agrees on the ultegra 10 though. It's as solid as they come. I've even heard a comparisons to dura ace.

I would like to see the source which shows you that the ChronAlu is comparable to the p3.

Just a quick review of one site (www.texascyclesport.com) shows the 105 gruppo (8 pieces: STI® Flight-deck® levers with cables, bottom bracket, crankset with 39-53 teeth, brake calipers - front and rear, cassette, chain, front derailleur and rear derailleur) retails for $460 while the Ultegra 10 group was just over $1000. Also look at the wheels and handlebars of the two bikes.

Actually, I've heard more than favorable comparisons. Ultegra is constructed of the same design as Dura Ace, but DA uses lighter materials. These can also be less durable.

Still think, in this case, that the Dual is a better value, provided they both fit and feel the same. And if they force you to take the wetsuit, see if they have one in the bear's size.