I had bluefin stage 1, then 2 then 3, then moved to revo stage 2+, which is the equivalent of bluefin stage 3.
The difference between the two is night and day at stage 2+ and have no doubt they are equally as good at stage 1. The difference is that BF is not bad at what it tries to do, it's a generic map that is 'safe' so allows for worst case scenario on any car it is applied to. So hence is quite conservative. One main area is timing, it doesn't run much timing at all over stock, this is safe but not the most you can get so doesn't feel great compared to revo
Revo is setup on the car and hence runs more timing. I have the sps switch so can adjust the boost, timing, fuel. Not that I do as it was setup by my tuner. But the car is setup to run more timing, the optimised fuel and more boost
In summary BF is good for what it is, but Revo is a better drive and offers more power due to how it works.
Don't know about R tech, but same tailored principle applies