After sinking 4 Large Convoy ships, 1 Aircraft Carrier (USS-Essex) & 1 Colorado Battleship at Midway i decided to call it a days play and started heading back to Batavia when i got there i was given the option to upgrade to the XVIII Walther Sub and i took it without second thought.
Now i wish i really didnt tbh. On my next mission i found out straight away some of the flaws of this Sub and im sure im not the first one to notice it but meh
The same trip ive done in my Ol'IX D2 (Batavia to west of Australia & patrol area for 48h) would leave me around about 65% - 75% Fuel but in the Walther i was very shocked to find that the same trip i was now down to 43% Fuel so i started heading back to Batavia ASAP.
With the IX D2 i could do the mission and any extra stuff that was threw my way (well most of it

) and still be able to raid a Port like Fremantle of the west coast of Oz Land & make it back to Batavia with no sweat.
The IX has even been to Cape Town in South Africa for a recon mission and back (That was a close one, I rolled into Batavia with 2% Fuel), The Walther would only be able to make it 3/4 the way there.
Now i know that the Walther has.
Pros: 6 Bow Torpedo Tubes
17 Extra Spaces for Reserve Torpedoes
Radar has an Advanced Screen (Rotating Screen over Zig-Zag thing)
H202 Walther Turbine ( 27knts on Surface i think and 20knts submerged.
Cons: Dosent have as much Fire Power compaired to the IX (Flak Gun & Deck Gun)
Fuel Consumption is alot more & the same speed as the IX
What do you guys prefer? IX or XVIII?