If you can get 101% on the existing fund, take it. Harder to call on the ongoing contributions.
Quinn Life's ongoing annual management charges are 1% or 1.2% (depending on the chosen fund) per year, reducing to 0.5% or 0.7% after 15 years. Irish Life's annual management charges are generally lower than these, from 0.75% per annum, again depending on the chosen fund.
A quarter of a percent per year may not seem like a lot but it's a quarter of a percent of the entire accumulated fund every year, so it can add up, particularly if you have a long time to go before retirement.
If you've got 15 years or thereabouts to go until retirement, I'd say the Irish Life plan will work out better, as the 3% lower allocation is a once-off hit, while the extra 0.25% for 15 years is every year.
Harder to work out for shorter or longer periods, as the QL charges drop.