A Standard Will deals with uncomplicated situations, and generally will/could include appointment of executors,  guardians, gifts & distribution of the estate.

A Specialist Will would/could include all the above but may need the inclusion of a specialist trust, (Discretionary Trust, Lifetime Trust, Right to Occupy Trust) or there are special circumstances where the Will drafter has to create a unique clause or clauses. (If unsure please ask before you order anything).