RE: Pension or SaS ISA29 May 2026 16:45
If you were taking all the money out in one go, then I'd guess at the ISA winning out. Yes, the SIPP would have a higher pot value and you would get up to £268k tax free, plus your personal allowance (if unused), but you could have a pot of a million if you'd invested wisely. So after 300k or so you are going to pay 45% tax on that. The ISA would be all tax-free.
Of course, this is a terrible way to be tax inefficient, and probably not the best way to take pension money for the vast majority.