The question is which of these two would fare better in the MAs? Is one of the two more interesting from a historical perspective? The 219 seems to have been produced in pretty small numbers.. Four times less than the 410: 300 vs 1200. So historicaly, the 410 would be a more valuable addition, unless it played more roles absent in AH than the 410 did.
M00T...the only major change to the 410 was more horse power. Minor changes were made to the airframe.
As I said...110 Production was canceled.....but was reinstated due to the poor performance of the 210 and 410.
Now.....if that isn't proof the LW didn't like them...I don't know what is. 
Willy was almost forced to resign his post because of the debacle.
The problem with the LW was they tried to make all their aircraft a jack of all trades. They were succesful in a very few.
Again...if you want a LW twin engined fighter ask for the He 219....it was a succesful fighter.
The 219 was more heavily armed then the 410, it was faster, and more maneuverable from all accounts.
It was a Mossie on steroids.
The 110 being put back in prod might just be politics. Maybe half of all I've heard and read about the LW is full of crappy politics.. Everything from hair splitting luftwaffle squibbles to full blown BS like Hitler's insistence on the 262 being a bomber. Apparently the 219 had such a purse fight around it too (someone called Milch and the guy apparently in charge of the 219). So I take it with a grain of salt, as well as anecdotic qualifiers like the 110's expected (before we got it) flaky flight characteristics. The rest is all from wikipedia, don't really have time to dig thru a lot:
Both planes use the DB603. The 410 the 603A, and the 219 the E. The E has marginaly better output, and is rated to 7km instead of the A's 5.7km. Does this make much difference in the power/altitude curve? Because otherwise the two planes are very similar: both have a ~30kft ceiling, and both have a top speed in the mid-high 380s. And the 410 is a lot lighter than the 219, while both have the same engines!
What about maneuverability? Both have anecdotic bad marks, the 219 was "underpowered and had low maneuverability", and the 410 was "merely" an improved 210 which was infamously quirky. Is it possible to set the two apart? The 219 is nearly twice as heavy as the 410, empty. If we use the wing loading rough rule of thumb (on empty weights, to bias this for pure dogfighting potential), we see that the 410 is much lighter on its wings than the 219, despite the 219's much larger wing area (390ft
2 vs 478ft
2): 51.4lbs/ft
2 to the 410's 33lbs/ft
2.
Flaps would play an important part, if they differed, but it looks like both use plain flaps. Maybe one of the two has larger flaps relative to the total wing area? The elevator and hstab areas, and aileron areas could be compared too.
Those aren't slotted flaps, are they?
This shot's from a game, so one more grain of salt there..
The cockpit in both planes look very good. The 219 has barely any nose ahead of the windscreen:
Visibility would be great, with its bubble canopy and wings further back than the 410's. The 410 has a similarly stubby nose ahead of the pilot, but also has glass sections right down the middle of the cockpit's forward part (click for bigger):
So while you wouldn't have the 219's visibility on angles below and behind the cockpit, the 410 allows you the less accessory benefit of a glass cockpit for lead shots, provided you're in plane with the target's trajectory.
As far as guns are concerned, the 410 is slightly better. They both had provisions for the MK103, but the 410 had a pair of them standard whereas the 219 "seldom" had them fitted for weight concerns. The 219 could carry Schrage muzic 30mm's, though, and players of AH would easily exploit these as well as the equally effective MK103s' range and lethality, by e.g. making passes at bombers with the SM equipped He219 on indirect trajectories while the guns would be pointed on target.. Might take some practice, but it would definitely be bad news for bombers. The 219 would never have to be pointed directly at the incoming fire.
The 410 has rear guns but that's probably negligible. While the 219 had (apparently, the couple of articles I had time to find weren't consistent) as many as 4 fwd-firing MK108s + some 20mm's.. That's impressive, but the 103s were omitted most of the time (not promising for their inclusion in AH's He219), and there weren't as many different packages as the 410: 6x 20mm, or (guaranteed) MK103s in the nose, and possibly a BK5 50mm. I think it's pretty much neck and neck between the two planes.
I see three decisive points between these two: First, the complete unknown of maneuvering character (flaps, departure, spins, verticals..) You can't read that off specification charts. Second, any difference in the speed/altitude curves might make or break their proficiency in the game. As it is, the figures I see are nearly identical. And third.. I forgot the third one.
Both planes are beautiful.
