The name executive can be a bot of a misnomer, they are small Defined Contribution pension schemes that are mainly used by directors, but they can also be used by small private companies as pensions vehicles for individual members of staff. The Executive schemes are approved under the same legislation as the larger DB and DC schemes, whereas personal pensions are approved under different legislation.
The main differences are that in an EPP, the employer can contribute to the scheme on behalf of the employee and the employee can contribute as well and claim tax relief, making contributions to the relevant age related limit (15% to 30, 20% 30 and over etc.). The member must also be taxed under schedule E (PAYE).
On a PP, the earnings must be relevant i.e. Schedule D and there are obvuiously no employer contributions. The contributions are paid at the same level as for employee contributions in the EPP 15% etc.
The other major difference was the way benefits could be taken. In PP it was simply 25% of the fund as cash and 75% to buy an annuity. for the EPP the rules where based on the revenue maximum based on service and salary, for maximum cash and a pension. These rules have changed somewhat for 5% and 20% directors and there is alot more flexibility with the EPP nowadays what with the advent of ARFs etc.