Not enough information in the post to give a comprehensive reply but I'm going to assume that the Acorn 'pension' is not a PRSA and that it's a Personal Pension (RAC), and it's of a fairly substantial value. I'm also assuming that you are talking to both on the phone and that none of what you've posted, from them, is in writing.
You're dealing with two pension salespeople in competing offices. I would say that Acorn are more accurate here than the advisor, in their (costs) conclusion. but the use of the word 'illegal' is wrong
The advisor seems to be selling you a product solely based on access to the TopTech100 Fund and hasn't done an analysis of the full costs on the Acorn pension. Fair enough, there might be a nil allocation period for any 'new' money that's going into the Acorn pension but I would guess that the current AMC is less than the 1.25% (?) being offered by the advisor. On some of their plans they also have a 'hook', that keeps you in, whereby they add 5% to the value of the fund at retirement age.
You have to be given a suitability letter or reasons why letter that would list the reasons why, in the opinion of the advisor, you should switch plans. I'll assume you don't have this and that this is what the Acorn rep is on about. If there was ever a dispute in the future as to why it was bad advice (to switch - maybe someone else does ananalysis at another time) then, the letter would be very much relied on by the Regulator.
Ask the advisor via email for the reasons why/suitability letter now. Also ask them for a like-for-like quote (with the Acorn one - I presume you have this as Acorn rely a lot on 'quotes') on the expected value at retirememt age. If they immediately ring you up and ask you why you are looking for these, walk away. If the only reasons for the advice is to switch to have access to the TopTech100 Funds, in the hope that this fund will outperform the Acorn one/s and 'compensate' for the higher charges, then walk away.
There may be some merit in not adding new/more money to the Acorn plan (because of a nil allocation period ie. no money invested for XY months) but you'd need to see a proper analysis of the costs and charges from both options before making a call on that. I suspect that the difference for an advised product would be marginal but a no advice/execution only one might do a lot better. As you appear to need advice, the latter option would not be suitable for you.
As an aside, a lot of people don't think about the
need for a Non-Standard PRSA. Remember, AMCs are not limited to 1%, or less, (ask Davy's clients). They can be increased with a few months notice. The advisor also has to tick a box as to why they're justifying selling you a Non-Standard PRSA. That can be (i) Investment choice requested not available under Standard (ii) The client requires ongoing advice and monitoring or (iii) Charges are more appropriate.
Gerard
www.execution-only.ie