With so many threads now started I'm finding it confusing as to what you are considering, what you have dismissed, then what has come back as a consideration again and why. Assuming I have selected the models that at some stage appeared in your other threads then they are not in the same category, the other three are endurance bikes, the
Allez is set up to be quicker, more like the
Trek Emonda you were once considering but dismissed as you found it
unstable, that bike will feel similar interms of stability to the Allez. Note I responded to your initial conclusion in that thread.
An endurance bike by design is set up to offer mile eating fast yet comfortable miles, a faster bike still will chase that
'extra mile per hour' more than a
'extra mile'; more speed at the expense of comfort, look how much lower the stack height is of the three Endurance bikes are to the Emonda and the Allez. Lower they maybe but they are not silly, if you are reasonably flexible, ankles and better if you try and do a toe touch for example then you will then OK
Specialized Allez 56: Stack 574 Reach 395 Head angle 73.5
Trek Emonda ALR5 56: Stack 577 Reach 387 Head angle 73.5
Trek Domane 56: Stack 591 Reach 387 Head angle 71.9
Giant ML : Stack 595 Reach 383 Head angle 72.5
Cannondale Synapse Stack 590 Reach 386 Head angle 73
No harm in being thorough but there is always a danger of information overload, I'm sure we have all been guilty of this at some stage and by the time we finally decide the item has gone, in this case both the 'bike' and the 'summer'. In your very first thread you said you wanted a "bike mainly for training and one race a year in the future", if 'one race' is more the taking part than it is bursting into tears if you don't win then by way of reassurance every single one of those bikes above will fulfil that role