Hmmm...I was under the impression that G-10 being a non-full production mod came before the K4 and the 190-D9 and the 110G-2 filled that role but I see your point.
Is this what you're thinking about?
G-6 AS:
Fighter/fighter-bomber - increased power by the installation of the DB 605 AS engine (DB 605A engine with the DB 603 supercharger)...increased tail-fin and "Erla-Canopy"...aerodynamically improved cowling.
The G-10 was a supplement to the K-4 as operations of the latter were scaled up. It also was a (failed) attempt to standardize production of the G series. They both came into service around the same time.
Didn't it also have the same canopy as the K4?
The Erla-Haube canopy was introduced late in the production of the G-6 series and was generally carried on all subsequent models.
190-D9 and the 110G-2 filled that role
What exactly do you mean by this? The Bf 110G-2 was a twin engined heavy fighter hopelessly obsolete in the day fighter role by the end of 1943, and the Fw 190D-9 didn't enter service until the Fall of 1944.
G-6 AS:
Fighter/fighter-bomber - increased power by the installation of the DB 605 AS engine (DB 605A engine with the DB 603 supercharger)...increased tail-fin and "Erla-Canopy"...aerodynamically improved cowling.
That's not a very good description of the Bf 109G-6/AS... the main advantage that this type had was that the DB605AS engine was actually capable of running competently at high altitudes. Other members of the G series are like bricks with wings above 20-some-thousand-feet.