G14AS over K4;
20mm nose option, Gondola options plus Rocket option, which is better for buff hunting.
Better range.
Better turn.
There are;
Different climb and speed rates.
Different weights.
Different torque amounts.
Handling characteristics.
As it is now we don't have any of the high altitude 109 versions which were used from spring of 1944 until late 1944.
Affecting every axis flyer tasked with high altitude interception.
Easy to answer, so let go back to my 190D9 question as I answered the pondering one for you..
Funny how they never complain when Fw-190D9s are used in numbers in 1944 events.
What does it sub for?