Stand alone villa: POSITIVE -- Usually bigger, more room, more freedom, higher possibility of subdividing and share with other families.
NEGATIVE -- Usually more expensive (as they are bigger), less facilities, you are 'on your own'.

Compound Villas: POSITIVE -- Security, neighbour from more or less the same 'social strata' (can be good or bad), more friends for kids, facilities, maintenance.
NEGATIVE -- less freedom.

A few months ago I also struggle with the decision whether to move to a compound or stand alone villas. In the end as a newcomer I opted for the safety in number of a compound villa.

Cheers
SK