
Hey DVU great to find some more GoFoilers out here. The front foil is a major factor, though the wing foiling is a system and all the other parts are going to play a role. For a given wind situation, the size and shape of your board, the length of your mast and the size of your hand wing are going to be significant in the early stages. Despite board size being significant I really enjoyed learning with a largish hand wing 6.0m for 7-15kts and used the M200 (maliko), an older surfy wind front wing, that requires some pump technique to lift off but which is very user friendly, easy to turn, not fast and has an extremely low stall speed, plus they are cheap as chips.
The NL190 is a medium wind wing for intermediate and upwards foilers, you should find the GL240 way easier to use. You may also want to check the position of your foil mast in the foil box as this could be part of what is holding you back. Then to answer your question in one sense the GT2200 won't have much benefit over the older GL but then if the newer GT really works for you and you have way more fun then it's a good investment.
this is me in 7-8kts on the M200 but I'm 12 years younger than you