I have added double triggers to both the 412 and 412S and cant tell any difference in springs, design etc.. However, there are those that state the 412S is better. I like both the 412 and 412s.
If your looking for .222 ammo check with Ron Reed at
www.reedsammo.com he made me some great Berger 60gr and Hornady V-Max 55gr ammo that is fantastic and a great price.
If the price is reasonable on the .222/12 I suggest you buy it, that is one of the best varmint combos available.
Did the Valmets come with the 412 scope mount?
Doug