If both are done properly, they will both be very similiar in performance. If either are done incorrectly, they both can have serious problems in accuracy and consistancy.
Stocks such as the H-S Precision stocks with the aluminum bedding block are fine but rarely do the blocks mate up evenly with the receiver. What happens when the receiver is tightened down in the stock is that, yes you have a very consistant bedding platform but it is also stressing the hell out of your receiver.
Even these stocks benefit from bedding because of their uneven fit to the receiver.
Its all about a perfect stress free bedding job. There are many ways to skin a cat. Personally, a properly pillar bedded rifle is very hard to beat in my opinion.
If you get a stock such as an HS, have it skim bedded for best results. It will shoot more consistantly that way.
Kirby Allen(50)