In 1945 production (after FEb) there is no appreciable difference between a G-10, G-14/AS or a K-4. Even the tailwheels on K models were locked down and closed over, just like on a G-10. All the same panelling and external parts are used. Even the oil fillers are in the same spot, because the ASB engine uses the DB engine main block and heads (only difference is blower).
The differences are marked in about Oct 1944. The G6 and G14 there is no appreciable difference except MW50 is standardised on the G14 (simplest way of looking at them, it's actually the instrument panel that's the only real difference). And G10 combine G6 surplus parts/tooling with as many K4 components as available, but any G6 parts used will be new.
The G10 always is equivalent to the K4, usually they're a bit lighter because the K series has a lot more fittings installed at the factory (the wiring for gondolas are there even if you don't order them, things like that).
The way you tell between a G14 in 1944 and a K series or G10 is the oil cooler filler. They're in a different spot between the 605A series and D series motors. Another good way is to just track the werk nummer.
You tell a G from an F by the same way, the motor. The 605 motor has a lot of termperature issues so the G onwards has some small cooling louvrés at the very front cowling either side, right behind the prop spinner. The F series doesn't have these.
All other things, like the landing gear, most fitted equipment, at some points the engine, the degree of K parts used, none of these things can reliably identify a model. Production in germany was a real mess in 1944, they assembled a tremendous number of Messers that year, but it was done by industry just throwing everything up in the air and going for broke, they were just desperate to get as many a/c out in the parking lots as possible.
Pilots just walked onto the lot, and the logistics officer had them sign a tablet, then said, "Pick whatever plane you want." And they walked off and left you there, with every Messerschmitt model and equipment fit imaginable, the K and the G14, whatever you wanted. They didn't care what you took.
Seyringer's words, not mine.
with your pics, the Type 110 (this kind of nomenclature means "modified") G10 is the erla model. It has a flat cowling on the port side, the starboard side is faired like the G6/AS. The G10 type 100 (means "standard"), has the same G6/AS fairing on both sides. The Erla one is more streamlined, pilots referred to it as the fastest Messer of the war, the K included. And Erla G10, Bär IIRC said was the only one you could reliably top 700km/h with in a combat encounter, very few planes could do that in practise, it was very very quick.
for prosperity there is the standard cowl (normal, F series with a couple of louvrés), the bulged cowl (extended-modified: type 100) and the faired cowl (modified-modified: type 110). De buele, etc. those are the translated german terms for them.
Here's a couple of scans extrapolating later production G14/AS-1945 (with D block ASB motor), and Erla G10, with some of the differences to regular G14, G14/AS-1944 and G10.
ANRCM-80.jpg
ANRCM-81.jpg
one final point, I've watched guys over at LEMB argue and change their minds about whether a detailed series of close up wartime photos of a late war Messer was a G14, G10 or K4, and they changed their minds a few times in the thread until they pinned it down. And those guys are the serious experts, their libraries are amazing.
Bf.109F
Bf.109G
Bf.109K
