I would suggest the exam is likely to be a little harder in terms of getting a qualifying score. It's an NFER exam like the old Sutton Coldfield exam. My interpretation is that it may feel easy to a child taking it, but how well you do depends how well prepared everyone else is.
While the numbers sound lower, 386 first prefs for 108 places (3.6 per place) is actually a little stiffer than QMH (319 for 96) and not significantly better than KEH (470 for 128).
So by all means go for it if it's a sensible option (it's another bite at the cherry if nothing else - and a different exam style which may or may not suit your daughter better than CEM) but I wouldn't see it as an easier
[edit - there is no catchment/priority area, it's solely on exam performance]
[edit again - oooh, and I think their admissions policy is in breach of the Code!
Twins, triplets, multiple births – in this situation when the sisters live at the same address, the place will be offered strictly according to the examination order of merit list. In the event that here is a tie, the place will be allocated to the first born...
2.16 In setting oversubscription criteria admission authorities must not: ... o) use oversubscription criteria that give priority to children according to the alphabetical order of their first name or surname or their date of birth.
Mind you, I bet they've not used that criterion yet!