No. The fact that the 0% is on the "enhanced" value is irrelavent, since with the pension route you are contributing gross, so the enhancement works on a larger sum.
Compare two investment strategies, person A invests in a pension and person B invests in ISAs. Both pay 40% tax, and both underlying investments are the same so they grow at the same rate. They both contribute the same net amount (so person A will actually contribute 66.7% more gross, but the net costs are identical).
Say person B ends up with a fund of 100,000.
Person A will end up with a fund 166.667% of person B's, ie 166,667. He can take 25% of this fund tax free, giving him a lump sum of 41667. He can do what he likes with this, so in this respect it is identical to the first 41667 of B's fund.
So we need to compare the annuity person A must buy with the remaining 75% of his fund, ie 125,000, with B's 58,333 which he can do what he wants with.
A will get taxed on his annuity income, assume it's all at 22% (his allowance and 10% band are used up by other income). So A effectively has a pot of 97,500 (net of tax) which he must use for an annuity, and B has a pot of 58,333 which he can do what he likes with.
So B has the flexibility, but it has cost him over 40% of the amount he could have had. It will be very unlikely that this extra flexibility would be able to earn him the same retirement income as A, unless he takes risks with his capital.