Having owned two Hardy's over the years I would say that for the long time investor, the Hardy is the better bet, basically the build quality is very high and they are incredibly tough and well designed.
My friend has an Aquafish 23 fitted with a 150 hp diesel and it's a lovely boat and well built, but the question you have to ask yourself is in 20 years which boat will hold its value the better on the initial outlay.
I think, and of course this is just a subjective opinion, the Hardy probably will.
All you have to do is look at what a 10 year old Hardy still commands in price.
Fantastic boats.
(I would have had a fishing 24 as opposed to a Seaworker when I upgraded, but I couldn't afford it).
Either way however, you wont go far wrong on either.