Your post specifies that it is a 'one-off' payment that you want to make but the correspondence you received from Hibernian would appear to make reference to 'a 10k+ per annum requirement'. You need to clarify if you are going the annual payment route as opposed to the 'one-off'?
The allocation rate quoted would appear to be for a 'one-off' contribution of between €7,500 and €12,499. This 'extra' 0.5% allocation can be withdrawn if you decided to transfer to another pension provider within 3 years of of commencement.
I suppose the only other subtle differences would be that a Standard PRSA can't exceed the 1% AMC. With a personal pension, the product provider reserves the right to increase the AMC at a future date, but you can transfer out if that happened. Also, you cant transfer a Personal Pension to an occupational pension scheme.
Hope this helps.