Both have open days tomorrow (not very helpful really!) - and are our de facto catchment schools.
Have to pick one to visit & think if it is worth using a CAF preference on - but can't choose between them on paper. They seem to be very similar regarding investment in infrastructure but weak exam results (presumably driven by the partially selectives 'creaming off' the more able kids) and variable local reputation.
Not sure if it's an option but have you looked at Bushey Academy as well?
I will be visiting Westfield next year as my DS will be in the 2016 intake. I chose not to visit this year as the school is being rebuilt. However, something you might want to investigate further is the Grammar Stream: http://www.westfield.herts.sch.uk/westf ... ream4.html