It won't matter. I have both. Love my R8's but they are crazy over priced. $2000 rifle with a $3000 advertisement campaign.
Anyone can work on a m70. If a Blaser is screwed up you just replace very expensive parts.
I mostly use my Blasers but only because I like the safety better.
You don't need a Blaser to kill anything. I don't know if it is a big game rifle or not, but a lot of guys are using them for dangerous game. I don't know that I would do that.
M70's are cheaply made, and nothing is custom on them. A Blaser might have better manufacturing but not by much.
I am a super Blaser fan, but I can't honestly tell you how much better or worse than a m70 it is.