Both are great beacons. I believe both beacons have a 40 meter effective search range. So I think that part of your statement is a wash. The Tracker 2 is simple and processor is very fast. At least as fast as the DSP, maybe even faster. I know it's next to impossible to out run it where you would have to stop to reacquire the signal.
I do not know about how fast the processor works in the field for the 3+. I have played with it but not in that sort of situation. My initial thoughts were that it was a lot faster than the S1 processor which you can get ahead of. Being that both come from the same company, I suspect it is easier to get ahead of the 3+ processor. Meaning that you have to be disciplined in a search, which you need to be for using any beacon anyway.
When it comes to your pinpoint, the system that Ortovox has developed the best one hands down imo. With the Tracker and DSP, you have to do a quick "mini grid" to find where you want to go for your probe strike. Both are super effective at getting you right on top of your victim, but sometimes it takes two or three tries to hit your mark. The 3+ and S1 use a shrinking circle on the display. When you get it as small as you can that is your spot to go for a probe strike. 5 out of 5 times I hit the buried bag with the S1 on my first probe. Highly impressed with that.
Also, since you are hikeswithdogs. Pieps is releasing a doggie beacon that works on alternate frequency that Pieps beacons can read. All you need is a software update on the DSP and you can do this. Might be something you want to consider. It's making me stick with the DSP for this season for sure.