I’ve got a Felt IA14 since January 2016.
I really like it but if it was a choice between a 2017 IA16 and a Speedmax CF 8.0, I’d go with the Speedmax. Incidentally my Roadbike is a Canyon Ultimate, with which I’ve been extremely happy for the last 3 years!
The Felt aerodynamics are good at low yaw but not spectacular and I doubt there’s much difference compared with the Speedmax. I haven’t seen figures and I’m not sure which is faster at low yaw (frame only). The Felt is intended to have an advantage at higher angles of yaw where the deeper aerofoils of the frame should provide some advantage. Do you often race in windy conditions? Either way, I doubt there’s much advantage for either bike in terms of aerodynamics. Setup of the cockpit (spacers etc) may be the deciding factor there.
Where there is a big difference is weight. It’s not the most important factor, especially for a tri bike but it’s not irrelevant either. The Canyon is listed at a pretty respectable 8.6kg. I’m not sure the list weight for the Felt IA16 but it’s well over 9kg. I think my IA14 was about 9.5kg stock and the IA16 is heavier. It’s a bulky frame which no doubt accounts for much of this but the stock Felt wheels are no lightweights either. If you’ll upgrade the wheels you can reduce the margin a bit but the Canyon will still be significantly lighter.
On the subject of wheels - The Canyon ships with considerably better wheels than the Felt. If you already have the HEDs, perhaps you could sell the new Mavic Comete wheels and get back a good portion of the purchase price. The Mavic Comete Pro Exalith wheels sell for about €1100 in Europe and the US$ list price is $1499. They’re somewhat comparable to the HEDs (although I’d take the HED Jet 6 for preference!) The Felt wheels on the other hand will do fine for training use but they won’t make you much if you sell them on. I’d say they’re worth one tenth as much. Absolutely no competition.
The Groupset spec is also much better on the Canyon. It’s Ultegra R8000 throughout and DuraAce levers. From memory, I think the IA16 is a mix mostly made up of 105 with Microshift levers. I’ve had no problems with my Microshift levers but I’d happily take DuraAce.
The bento box on the Canyon looks much better than the “Calpac” on the IA16. There’s been a new version of the IA Calpac released in the last month or so which aims to improve on the universally criticised original design (the original will almost certainly come on any 2017 IA16 unless you do a deal). Don’t get me wrong, the original can be used. But many of us find it clumsy and annoying. The main downfall of an otherwise very nice bike.
The B14 is a nice bike too. My main training buddy has one and I very nearly bought one. The same weight and wheel spec comments apply to it as the IA16. It’s probably a little less aerodynamic but still not bad at all if you can set it up well. There are no provisions for storage which may be a factor.
In summary, I have and like the Felt IA. But I think the Canyon is a much better deal and quite possibly a better bike too. If I was you, I’d probably eliminate the IA from the list and choose between the B14 and Speedmax CF 8.0 based on budget.
In fact, I might consider the Speedmax CF 7.0 as an alternative if you want to reduce the price and the wheels on the 8.0 aren’t of interest. It’s 105 rather than Ultegra but the same frame, still pretty light and good aerodynamics and a fair amount cheaper.
I think the 7.0 is more comparable to the IA16. The 8.0 is definitely a level up.
All 3 are good bikes. Enjoy whichever you go for!
My overall ranking based on aerodynamics, practicality and weight:
Canyon Speedmax 8.0Canyon Speedmax 7.0Felt IA16Felt B14
My ranking if budget is of high importance:
Canyon Speedmax 7.0Felt B14Canyon Speedmax 8.0 (move up to 1st you’ll sell the wheels and cranks!)Felt IA16
P.S.
Of course the other very important factor that no-one else can speak to is whether there’s one you just like the look of! Aesthetics, whether it’s the shape, the paint scheme or both can be important too!