They fit completely different, it is not going to be a choice between the two.
If one fits you well, the other will not.
Perhaps neither of them fit you.
Get a bike fitting.
Blue Triad will be taller stack/shorter reach (I believe) compared to Felt… which one fits better? Both great bikes… I am kinda partial to the Blue, but mainly because it would fit ME better!
I think to some extent people too quickly say, “let fit decide” on this forum because bikes, aerobars, seatposts and stems have adjustability and different fit parameters. However, the Felt F series is a closer geometric match than the DA to Blue’s bikes. I’m really not exaggerating.
Personally I’d go Felt, even if the fits weren’t so drastically different.
Thanks for looking at Blue. We really appreciate that we are one of the bikes you are considering. However, i will tell you there is a big difference in the way the two bikes you have listed will fit.
As much as i would love for you to buy a Blue, i would rather you buy a bike that fits you…even if it isnt a Blue.