Are you able to get official testing? This would help with a lot of self doubt or guessing.
Generally speaking, a big gap between the two is a sign of NVLD. But there are other symptoms like poor social skills, clumsiness because of seeing objects too close/far, poor fine motor skills. Those symptoms many people with Aspergers also do have, so that's why it's a very common co-morbid.
I can only tell you my experience, but when I did my testing, I saw the psychologist notes briefly, and noticed that she wrote NVLD for me when I talked to her, but after testing, I was not diagnosed with NVLD, but just ASD. I don't have a wide gap between my VIQ and PIQ; in fact, they are almost identical. I had language delay, so my language skills have not always been up there. My VIQ is slightly higher than my PIQ, but like by 5 points.
Executive functioning deficits is a sign of EFD, AD/HD, and ASD. Generally speaking, the specific executive function deficits shown in ASD is cognitive flexibility, self-monitoring, and emotional control. Like, these are just common among people with ASD generally speaking. Processing speed can be related to ASD, as my step-brother has an extremely slow processing speed and has ASD, but I have a fast processing speed. Hope this helps 