Daniel, I would say that both basses are similar in terms of brightness. This obviously depends on your amp EQ, use of the blend knob etc. but with the blend knob in the middle position, there's not much in it. I have both and find the Decision a more powerful guitar with the two blade pickups. They just seem to have considerably more output. Having said that, I tend to play the Mercalli more as I just prefer the scooped tone, with the blend knob slightly towards the front pick-up. I usually (well pre-COVID) would bring the Decision to those gigs where I wasn't using IEMs. I don't think you can wrong with it.
