I'm not sure I agree, granger.
The Irish ratings are higher over here because the data are saying the Irish ratings are too low. It's only once we get to the better horses (150-ish plus) that the two authorities get their heads together and agree a rating.
Another anomaly I've noticed is that when our hurdler go over fences they carry their rating across, at least to start with. That doesn't seem to happen in Ireland where a - say - 135 rated hurdler can start out in novice chases with no rating so they can run in the weakest of the weak races and earn a chase rating in the low 100s.
As I've said many times, my own figures suggest that, on a ball-park basis, chase ratings are about 10lbs higher than hurdles ones so those horses could find themselves in a position to exploit the system.
Another anomaly is when an Irish horse earns a high chase rating compared with its hurdling mark no allowance for that improvement is factored into its return to hurdling, so Total Recall, for example, which had gone up to 155 from 147 for winning the Newbury Hennessy, could then return to hurdling off 125 next time out in Ireland and win an £80k handicap.