Soren - lets look at one example which illustrates aerodynamics and priorities - you can cite others.
The Republic XP-72 was ordered in July, 1943 with an initial order for 100. It was designed around the PW 4360-13, counter rotating props and mustang like 'thrust radiator'. It first flew on 2 Feb, 1944 with the following Flight Test results - 480mph at 32K, ceiling at 42,000, 1200 miles range, 5280fpm initial climb.
That was with the -13 engine. The planned performance with the 4360-19 was 5,500 fpm climb and 540mph at 32K.
The program was cancelled because the USAAF believed the a/c was not needed and only a small incremental increase in performance over the P-51H.
So, this a/c which had similar to greater performance to Ta152H was never produced despite flying six months before the Ta152!
Below from various sources - maybe correct (Erich?)
The Ta152 was initiated in late 1942 and because of priorities did not really get much done until late 1943, with first delivery in July 1944 and first flight in August 1944. It went into serial production in October producing the first Ta152 in November - getting 34 delivered and went into ops Jan27, 1945.
So I suspect you won't use the Ta152 as an example of a German design 'easy to get into production from concept to first flight' in contrast to the P-80 and the P-51?
In contrast to the XP-72 which a.) flew seven months before the Ta152H, and b.) was faster and climber much faster with the -13 engine and projected 10% even higher performance with the -19, the Ta152 was
a. ) 'Buggier' with several crashes and other issues due to the extremely high pressure to get into production (31 hours total test by end of November, 50 hours by January 1945?)
b.) Had a much higher ceiling at 48K (but who was it going to fight there?)
c.) Did go into ops - but the latter was a conscious decision by US to NOT bring the P-72 into production and Germany to force the Ta152 into ops before it was ready.
For similar reasons the P-51H was ready and fully operational and deployed to units in US in March 1945- approximately 35 days later than the Ta152H but far more reliable at that stage of development.
The XP-51G first flew in August 1944 (like the Ta152) and attained the highest performance of any Mustang achieving 495TAS at 22,800 feet, climbing to 20,000 feet in 3.4 minutes with 2,000 hp at 20,000 feet. Only lack of a pressurized cabin limited the ceiling to 46,000 feet. The engine was a special Merlin 100 with a five blade Rotol prop. The latter tests were performed at both NA facilities and Boscomb Down and completed by Nov 1944.
The first P-51H (production) flew on February 3, 1945 and the first operational squadron was equipped in March 1945. This ship had a 'no stores' maximum speed of 487mph - still higher than the max Ta152H
So, except for the the superior 'design to flight cycle', 'flight to production cycle' of the Allies, equivalent fighters (recip) in flight (XP-51G, XP-72) before or same time as Ta152HV1, where do you want to demonstrate superior aerodynamicists and engineering programs with just the stellar Ta152H?
It's all about putting the right tool in place at the right time. The Germans were suprised that we (US) didn't assign Japan as highest priority and initially weren't worried about US daylight bombing.. but they had from Aug 1942 to the end of the war to design and implement the 'stoppers' - but they failed.
The US with help of UK recognized that daylight bombing was going to be prohibitive without escort fighters - modified the P-51 with Merlins in summer of 1942 and put the P-51B into production in March 1943.. about six months after 8th AF started combat ops... the first ones reached UK in Sep 1943.
The Germans saw the disaster coming at high altitude escort by P-51s in Dec 1943 - and put the Ta 152H into combat one year later despite starting design in 1942.
As to your pocket Battleship - contrast away. Give it your best shot. The Japanese actually take top honors on the BB's from a firepower standpoint but perhaps behind in fire control. Dig up your data on the fine German 'pocket' BB's and contrats against Alaska Class Cruisers and Iowa Class BB's?
And BTW, the double hull design of German U-Boats did give them superior crush depths to the Balao and Trench boats but fewer torps , shorter range, more time to get to station... but your best boat only put two into ops by end of war. Different designs for different priorities. Still, THAT U-Boat was superior to all Allied designs..