flat bar hybrids will feel different than a dropbar road bike - for a lot of reasons
here's just one - hybrid flatbar, your furthest reach is even with the flatbar, which is close to even with the end of the stem (or closer depending on how the bar curve is set). Roadbike dropbar, the common position is 'on the hoods' which, if you add the bar forward projection/curve, is anywhere from 7.5 cm to 11.0 cm further forward from the end of the stem.
removing some variables, like using same stem angle/length and saddle position behind BB, let's compare - your absolute with 60 cm TT + 12 cm stem = 72 cm, the trek Domane with 56.7cm TT + 12 cm stem + (taking a middle dropbar reach) 9.0 cm = 77.7 cm
so the 'smaller' trek 58 is a longer reach than the 'larger' absolute.
likely though, the trek 58 had a 10cm stem on it... so deduct 2 cm for a reach to the hoods of 75.7 cm - still further
what this shows is that you can't compare a Flat Bar Hybrid design directly to a dropbar roadbike...
the FlatBar Hybrid really fits more like a Modern MTB with road wheels.
fitting the road bike to match a hybrid position would be a mistake in the not too longterm of a few months.
Best is to consider the road bike position and work that for the best size and fit.
as for the online calculators, they work ok for many who are in the middle of body variances, less so for those at the extremes - and those where one or two measurements are not quite right - well they'll be all mucked up...
there are other differences... you'll just have to sort it out and make decisions