Art, as Tom D wrote: Ultimately the bike that will be faster, much faster, is the one that most closely matches your body dimensions and is then positioned to facilitate your strengths and accomodate your weaknesses.
I know for a fact I can stay more aero for longer on the Titan Flex, simply because I don’t get lower back pain, nor taint numbness, although I have the bikes set up to as close to exactly the same as I can measure. The thing that has really surprised me, is that I can rotate my pelvis more forward for long periods of time when riding the Titan Flex…simply because it doesn’t hurt the taint to go over bumps. My glutes therefore get more work (to the point that they actually get sore at the top and at the hamstring insertion area). It’s this better pelvis positioning that I think may make me faster on the Titan Flex on longer races. Although I might be able to race more steeply on the Titan Flex, I don’t know if steeper will be faster…there’s always the issue of being so steep I can’t bend my aged stiff neck up enough to see the road, plus, at some point, steeper isn’t more aero.
FWIW, last year, at least on shorter races on the Yaqui, I would go ahead and rotate my pelvis forward despite the resultant taint pain, and after those short races, that gluteal soreness always appeared for a day or two. So, if nothing else, the Titan Flex is allowing me to train MANY more miles in a more powerful position…I’m hoping I’ll be faster on any bike with so many more miles in this better position.
As someone else mentioned, they both seem very stiff in the rear triangle. When standing and cranking hard on the handlebars, the Titan Flex is stiffer feeling torsionally from my hand to my opposite foot…BUT, I never ride like that in a triathlon. Maybe the suspension effect makes the Titan Flex corner better on rougher surfaces, then again, I don’t purposefully make that kind of aggressive cornering in a triathlon.
If you decide to get a beam bike for long races, you won’t be disappointed with the Titan Flex…it’s so beautifully simple in design, and just as simple to adjust. You can get it really stiff, or not so stiff…whatever floats your boat. So, yeah, your reasoning makes sense to me.
I’m just wondering if I’ll be able to tell if one is faster than the other in shorter stuff.