Isn't it enough for the prospecting limpet to have connected to the asteroid and you getting the "asteroid prospected" announcement (or whatever it was, can't remember by memory)? Does the prospector limpet need to be there for anything anymore after that?
Surely you don't need it after you have lasered the asteroid to depletion? So I'm thinking: Shoot prospector limpet, wait for the asteroid to have been scanned by it, laser it to depletion, move to next asteroid and rinse and repeat. I don't see a need for two simultaneous prospectors in this process.
2+ prospectors are useful to "pre-scan" asteroids, so when you finish with one asteroid, you move directly to the next target, minimizing the time between targets
So, while moving to an asteroid, you can fire several prospectors to several asteroids that are clumped relatively close to each other.
Or, if your colleting speed falls too much behind the mining speed, you can use the time to prospect several asteroids.
In this regard, mining speed, the Python is way better than T-8 since it can power 4 medium mining lasers, greatly speeding up the mining part.
Then it can position itself closer to the asteroid thus greatly speeding up the collection rate (it's cargo hatch is closer to asteroid than in the case of T-8) and can use 10 collectors while still getting 192t of cargo.
But, again - this doesnt mean that, if you really love the T8, you cannot mine with it.
Just that it's a less apt miner than the Python.
I mean, what the heck! People are exploring with T-10 and they're happy with it (even tho i regard T-10 as good only for module storage

)
Why wouldn't a T-8 lover be happy mining with it?