The sb5 can have a "gifted composite" score calculated, which is similar to the gai in that it removes WMI.
For what it's worth my kids both score higher on the sb5, most notably in the visual spatial sections. Their verbal scores have only margin of error differences between the two tests.
Also of note the WM tests in the sb5 are different and for some people thy are easier. My eldest has a very poor working memory but does better on the sb5 style WM tests than the wisc.
This is very good information for me Mumofthree! Thanks... I will want to see the WMI on the his SB-V compared to the WISC from last year (se if he does better with one type of WM test over an another, etc...) and then I will definitely want him to a WIsC IV again this year. I will also want to push for getting that "gifted composite" score calculated - I strongly suspect that once the WM is removed he will be pretty squarely in the "gifted" category and hopefuly I can start getting him some services to address his gifted needs.