I’m quite happy with the Rev2 and have no plans to get a Prophet 5.
This is the first comparison video that I have seen. Like comparing the Prophet 6 and Rev2, I think the raw sounds can be made to sound remarkably similar… But you have to work a little harder to get them with the Rev2.
https://m.youtube.com/watch?v=cY8WcDoTVeM
I saw this video, but I feel that it is similar to the Starsky Carr video where he compares a Rev2 to a Prophet 6. It shows how they can sound similar in some situations, but they don't convey the true sonic differences between the two in real-world playing.
When two synths are being compared, I think there are multiple possible comparison criteria, some of which are:
1. Ways the two can sound similar
2. Ways the two can sound different
3. The differences/similarities that occur when using one or the other for live playing vs general music composition, etc.
4. How the synth "naturally wants to sound" during sound sculpting, when not being specifically goaded toward sounding like another synth
Most comparison videos I've seen focus only on #1 because it's the low-hanging fruit and patch matching between is far easier than exploring all of the vast territory of differences and range of each synth. Very few people invest the time to do #2 or #3 because its infinitely more time consuming.
I could probably sit down and whip up 4-5 patches and make them sound identical on all of three Rev2, P6, and OB6. Most synths have the capability to emulate another synth reasonably well. Even though I don't have a Rev4 yet, I'm guessing Justin could have easy compared a sound on the Rev2 with FX to a dry signal on the Rev4, and listeners would have (unfortunately) come to the conclusion that the Rev2 has a richer sound.
Working with them side by side (and not limited by YouTube grade audio), I feel the difference in both oscillators and filter between the Rev2 and P6 are substantial, I would expect the Rev4 to sound closer to the P6. Even the OB6 and P6, which have identical oscillators, FX and differ only in filter type, really have their own personality as Dave always says.
I do agree with Justin, that the Rev2 is the best value in Sequentials product portfolio right now. There are things the P6 and OB6 do better, but there are things the Rev2 does better. I treat them all as equals with different pros and cons.