Unless the B-26C you are referring to is a Marauder. Or the B-26B you refer to is a post-1948 Invader. Without the name there is just room for more confusion.
We would all be served better to just call an Invader an A-26 unless it is the K which we can call a B-26K--which was itself re-designated A-26A. Oy. So calling all Invaders an A-26 and all Marauders a B-26 and just leaving it that way would help make everyone understand wtf is being said. Otherwise, if you call an Invader a B-26 on purpose then please append it with Invader.
Face palm.

Sorry guys, didn't mean to confuse anyone. The Douglas B-26 "invader" was actually first designed in 1942, but because of a number of things, non were ordered until 1944 and because of prior contracts, non really flew in WW2, although I found a web site which said they did. They first came into the fore front of bombers during the Korean conflict and was the last aircraft to drop a bomb in that conflict 30 minutes prior to signing of peace agreement with the North.
This aircraft was actually designed to take the place of the A-20 Havoc in the USAF inventory and several varients were produced over the life of the aircraft. The aircraft designation was changed by the USAF in 48 I think.

This a "C" model in flight

this is the latest version of the "Invader" series, which was used though out the Vietnam war, mainly hitting Ho Ci Men trail, both during day light and night.

The "C" and "K" office!
While the Martin and Douglas aircraft both played an important part in military operations, there is no question, but that the "K" model was the most effective medium bomber as far as "heavy" iron was concerned!