I can't compare the two because I have never shot a Savage, but a lot floks seem to really like them. I have never shot a Sub MOA Vanguard either, but my smith just picked one up for me (in 300 Wby) for a build I want to do on it and he said the factory shot target group was about .35". i haven't see nit yet because he is about 3 1/2 hrs from me.
I do own a S&W M1500 in 7 RM, which is the same Howa action and I like it a lot. The last time I shot it, it grouped about .3 something @ 100 yds.
What I like about the Sub MOA Vanguard (or any Howa action) is...
- integral recoil lug in the receiver
- flat bottomed receiver
- one piece bolt
- M16 style extractor
- ported bolt sleeve
- very easy to tune trigger - now I've heard some have difficulties tuning the trigger, but that's not been my experience and seems to vary gun to gun.
- a good selection of aftermarket stocks, bases and rings (any Rem 700 bases and rings will fit the Howa)
The Sub MOA platform, stock and action, are a good one to build off of when your factory barrel is shot out - not that the Savage isn't.
As mentioned, I think it comes down to personal choice. Take a good look at the features of both, go out and handle both and make your decision.
-Mark