Whoops, I think I posted at the same time as the OP's later post and so didn't see this.
LOL, no worries! It was also in the OP. Meanwhile, I distractedly did not do the math and realize that kiddo was not yet 6, could not take the WISC just yet. I was quite focused on getting the potential 2e identified. Good thing there are many of us to answer posts! Somehow together we get it all covered.
if ADHD is a real concern, a full neuropsych exam may be warranted...
you might want to approach this by first finding an appropriate tester, and then asking which test instruments s/he uses. Not everyone has a license to give every test, and it's a perfectly reasonable way of narrowing things down a bit. What were the circumstances of your child's first WPPSI? Why did you test him/her, and who did the test? You could just return to that person, if it's someone who had a good rapport with your child.
ETA: If you don't know this already, aeh is our "resident expert" on testing
Agreed!