There is this gerbil, and it is running on one of those wheels, and I am thinking, maybe that is the engine that is making your mind work this way.
*** "I narrowed between Korbel and TSPW because they're best ranked, though stiga is close, too many complain is too stiff,"
If you are basing your research on product reviews from some place like tabletennisDB than I am not sure there is much hope for your thought process. Those kinds of product reviews are flawed for so many reasons.
1) many of the people who write them are writing a review of the only blade they have tried.
2) they are written by anonymous users with no indication of the level of experience or ability to judge good from bad in a product.
3) even if a review is written by a competent reviewer who has tried many many blades, if his level is not similar to your level the information he presents could be good while still being BAD for YOU.
*** "Then if the Primorac is slow like the Joola then is not good idea buy it,"
I think what you are missing here by going back to this ridiculous subject that you clearly don't understand is that, YOU ARE REALLY a BEGINNER and should use a blade good FOR YOUR LEVEL. For you SLOWER than what you are looking at is what you ACTUALLY NEED.
But, I want you to go watch the footage of NextLevel playing with the Primorac. Tell me if that is too slow. Beginner's tend to think they need fast blades because their technique is bad and that ends up preventing them from learning good technique.
If you are drawn to the Korbel, you should get the Primorac and use that and only that for a few years. I saw the footage of how you play. You are a beginner and you need a beginner setup. One of the major flaws with how beginners choose their equipment is that they choose based on crazy things like product reviews from random people where they don't know the level of the person or how the information could possibly pertain to the beginner in question's actual needs from a setup.
At the level you play at you should be using something very simple. And I am telling you that the Primorac would be better for your development than the Rossi blade you have because it will be 5 plies and it won't have the paper ply. That is what you have right, the Joola Rossi Allround 7 with the hollow ping?
Get the Primorac. Play with it and only it for the next two years. They will still make Korbels in 2 years. In two years you can get a Korbel. But for now you need something more like a Primorac. Or maybe I should tell you to get a Stiga Allround Classic.