If you use control+ app you are stuck to exactly the same set up as the original set, 42099 in this case. The powered up app gives you more freedom in what you want, for example only one XL-motor (just an example).
Btw, If you have trouble with coding in the powered up app, check out racingbrick.com, he has a summary where the function of the code blocks is given and some instruction video’s. Was really helpful for me :)