There are many ways to explore and all of them are valid. Saying "range" or "scooping speed" is unimportant to your narrow playstyle is as obnoxious as the people who brag about taking down an elite anaconda in a sidewinder.
I totally respect all play styles and never said they are not valid.
I agree, though, that my style is very narrow, but I am glad to learn from other posts in this thread.
Editing your OP as I just did, it almost come across as trying to troll in this thread! LOL....I know you are not, but seriously, you asked the question and gave the best answer to yourself all at the same time.
I didn't mean "trolling", but I indeed had an answer in my head when I was writing my OP. Because of playing only one way, I had this tunnel visioned thinking, which possibly made my post sound provokative.
I want to thank all people for sharing their exploration strategies.
Simple calculation:
Lets say you compare 35Ly jump to 25Ly on a trip to sag with around 25k Ly
714 Jumps with 35Ly (if perfect)
+286 Jumps with lower range
Now, let's say you earn 25k Cr per system on average (for example). So with 35Ly you get 17.85M Cr, and the lower range will give you +7.15M extra
You see, this calculation can be turned over depending on what is your optimisation criteria. That's why I started this "play style" differentiation. Unfortunately, people took it the wrong way.
On the other hand, if you choose between two ships that have identical characteristics apart from one having a larger jump range, it is obvious that longer jump is more preferable in this case, because it's like an extra bonus. The trick is that other characteristics are usually different, so it would still be helpful to learn them.
I bought the skin pack for the Python, even though I'm still a week out. Gives me something to look forward to.
When I get back I'm going to equip it as an explorer (no 10% penalty ) and pose in front of many things. It is after all the prettiest ship in Elite at the moment.
If it's range exceeds 20 Ly, I'm golden.
I want to buy Python too. That was the reason for my concerns about the jump range in the first place. But I also have a bad habit of outfitting my ship for all purposes, which includes heavy armament and shielding (I assume rotten tomatoes are already flying my way...), big cargo space. I know this is stupid and inefficient, but I like my ship to be a "jack of all trades"

So even with 5A FSD, my Asp got only 25Ly range. For Python this could be a real issue.
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Actual speed up & slow down is, I think, fairly constant across ships. It's a function of the FSD technology and determined by the strength of the gravity well you are in. But I've never tried measuring this across different ships so it could vary. But it's nowhere near as obvious a differentiator as rate of turn!
Thank you for your research!
The acceleration/deceleration measurement is tricky due to gravity interference. I am afraid you can't just measure it directly.
From my own experience, I noticed that there is some sort of a breaking point in time-to-destination in SC. If you reach it, you will overshoot, and it would feel like being "dragged". It seems to be constant for a ship if the distance to destination is large enough (>0.1Ly). For my Asp it is 5s. When I switched to Type-7 for trading, I noticed that I need to start deceleration before 6s. The difference is actually small, so it might be irrelevant when choosing a ship.
But don't forget heat management.
That's super-important indeed!