I ended building with Ultegra Di2 groupset, Pass Stone chainrings, XCADEY spider powermeter and Elilee X310 cranks.
To be honest, i cant feel any difference between that and Bianchi. I switched to 165mm cranks from 170mm and to 30mm tires from 28mm - it feels very smooth, easy and comfortable to ride. I also think that this setup is quicker, but i need to calibrate XCADEY with Kickr trainer first.
I bought crankset because of the look and i cant find any advantages more than that. Cranks are so massive that i hit my ankle twice on sunday. Chainrings are more noisy than 105 Di2 from my previous bike.
I would definitely choose Speeder over LCR (design, geometry).