Normally you will get more interest paid monthly because the interest is compounded, so the interest you earn is included in the calculations for the next month - this is included in the AER but not in the p.a. rate.

At first look though I think you would get the same monthly or yearly in that account, because it quotes the same rate for AER / p.a. and gives you the option of monthly or yearly.

Not really clear at-all though from that page.