B16 improvement?

I ride a 2011 Felt B16 with a disk/tri-spoke combo. Assuming the same fit, wheels, etc. and my 40k speed of +/- 25-26mph, what ballpark real world savings could I expect in a flat 40k TT switching to a 2014 DA4 or Shiv Comp? I think I’ve picked the low hanging fruit and am trying to weigh the cost/benefit of a bike switch.

Thanks for any input.