Not sure if this is directed at me, as I never said the V6 was "fast". It is decently quick for what it is for sure though. I know all about fast cars, considering I own a low 11 second Camaro and my daily driver even runs 13's.
Sorry, but your earlier statement is incorrect (both about me and fast cars and about the I4).
1. I've owned a 10s Corvette and currently own a mid-12s Mustang and Firebird. 13's are not that great so you've either not tuned them or they're just going to stay slow. I've had (and still have) my fair share of power and I still say the I4+A6 Malibu is quick.
2. A car can be quick and not fast. The I4 is a quick car. I did spend time behind a V6 Malibu. I also spent time behind a V6 Mustang, a V8 Mustang, a V6 Caddy, a used V8 Corvette, and numerous other I4s when shopping for the Malibu. Is the Malibu fast? No. Is it quick? Yes. (although my reason for choosing the Malibu is related to none of this)
3. I'm going to make a reference that you should understand. ~25 years ago, a V6 Firebird made ~135hp. The V8 version made ~215hp and that was the tippy top of the line IROC-Z. The I4 Malibu makes 169hp and the V6 makes 252hp. The Firebirds from back then were very hot and you still see them all over the roads (especially IROC-Zs) and they were "Fast!". My Malibu stock will accelerate from 0-60 at ~9sec. The IROC-Z (pick the best from 85-90) will accelerate from 0-60 at ~7sec. 2sec difference is hefty in a race. Regular driving (what 90% of most people do) won't. And take into consideration that is an I4 going against a V8. That IROC-Z is slower than the V6 Malibu and barely faster than the I4 Malibu. So, is that IROC-Z now a "Slow" car just because some other car exists that goes faster? Or is it that the IROC-Z is fast and there are others that are "FastER"?
My point is, just because there is something with more hp and a quicker 0-60 time, does not mean something else is slow...
If you think that is what it means, then your cars are nothing more than toys from a cracker jack box.
@Driven Daily and OP: I agree with DrivenDaily, if you like the V6, great and go for it! However, drive both or whichever one feels right to you. If you want to know which rides smoother, drive them both for yourself. You will be much happier if -you- found the right car for you instead of listening to other people.
Another point in regards to the number of cylinders:
My Dad had a 2007 GMC Sierra. It had GMs technology that allowed it to shut off 4 cylinders (leaving it with 4 cylinders) if the V8 was not needed. The GMC Sierra also has a curb weight of ~5350lbs (and after the tools we had in the truck and the two of us, it is going to be no less than 5700 for the one we had).
Most of the time the Sierra was in the 4 cylinder mode (including when we accelerating most of the time) and it would get up and go. So, if the 4 cylinder is supposedly not enough of an engine to hand a Malibu that has a curb weight of ~3400lbs... then, why would the Sierra only need 4 cylinders at ~5700lbs?