Depends. It just depends on the type of surgery that is being done; ideally most children's surgery would be performed at Children's hospitals by childrens surgeons, but there simply are not enough of either...but in general, the pediatric surgeon is the most qualified to do the case, though some cases are very high risk.
Risks. Of surgery depends on many factors. Pediatric surgery done by qualified pediatric surgeons carries same risks as adult surgery. .