It depends on how much risk you want to take on.
Your current cover has no risk - if you die before the term and have paid the fixed premiums up to this date of death you (or rather the beneficiary) will receive € 230,000.
The Acorn Life will pay out more, but the premuims are not fixed - they can (and probably will) be increased over the term of the policy - so are you prepared to pay the increased premiums over the life of the policy.
It's a gamble in either case - if you die, they pay out - if you don't, they don't.
So, the question is do you prefer the fixed price or are you willing to take the risk that the increase in premiums will still come in lower over th elife of the policy?
I suspect that insurance companies are much better at calculating the odds than you are. In the case of the fixed premiums, thay are set at a level to ensure that the company will make money in all cases, whereas in the variable premium, that have the option to increase the rate to ensure that they will make money.
Also, check that the range of illnesses covered are the same in each case.