A word from an average racer
I've raced Vega gen 1 and gen 2 as well as DB1 prior to the RB6.
2wd are my fave and I've been following closely Matt Owen, Kevin Lee and Tony advises and setups, adapting them for my own use and driving abilities (

)
The first one told me wisely to stick with one car and focus on driving and learning that particular car behaviour so I did and drive the crap out of the 6.
After the first three months with the car I was very happy with its stability and jump capacity but I did not well at races. The car was safe but not fast and agile as I was used to (after the DB it was a huge gap).
Yet the best stock mid car of the market, awesome quality, very durable and coming from the RB5 a huge work from Kyosho on a lots of details.
I kept working on it and I've got a wonderfully balanced car now, very fast still safe and very durable. It took me a good 6 months to tune it up like this, trying various setups and parts and I'm glad I did. For sure this car is very responsive to setup changes and it means range is huge, yet almost everyone running one is very happy about it.
A (very) good driver can drive almost any car fast, even with a slow setup as he will always go for the best line and keep momentum. I need a more responsive car to help me coming back to a proper racing line !
Car is very close to Kev Lee setup with lighter oil in the front, small bores shocks and RB5 rear arms, Rudebits shorty craddle, Ghea front block and R1 wing for more lateral grip. Fast and safe (for me).
And it helped my driving a lot too. I'm very confident as I won't broke the car on every jumps, it can really take a beating, not saying that what I'm trying to do !
I know the car itself can win every heat I'm racing so it all come down to my driving and it feels good !