What is the difference between verbal dyspraxia and servere speech and language impairment?

Thanks for the message. I wouldn't want to give difference diagnosis advice in this area as speech sounds are not my area of clinical specialism. My advice would be speak to your SLT about this (as they will know your child's profile) and also look at the Nuffield Dyspraxia Centre referral criteria (http://www.ndp3.org/dyspraxia-referral-guidelines.html). 

BW 

Chris