One good and simple example has arisen in my mind on how to easily combine interpretations and see how both systems working together via "covid" lockdowns that we all have witnessed.
The first major lockdowns throghout the world happened in end of March beginning of April 2020.
If you use tropical abstract zodiac, what will you see? Saturn entering Aquarius. What is Aquarius? A sign of complex systems. So, our world, as an economic system was "paralyzed" by Saturn.
But if you'll switch to sidereal, you will see Saturn only transited first 5 degrees of Capricorn. What is Capricorn? A sign of energy given constant direction to achieve zenith, the "high ground", hence it's mostly used as the sing of career and profession.
What was happening in people's minds during the lockdowns? Many lost their jobs, many began to think about quiting, many thought of switching jobs, many were FORCED to switch. Many started to implement changes to their business models, so they would work in the lockdowns(i.e. creating an internet site for your services, etc).
Tl;dr many people were faced with restrictions and limitations(Saturn) with their workplaces/careers and this launched a thoughtprocess in them: am I prepared for this in the future? What should I do now? Should I stay? Should I get a new profession? Was my choice correct in the first place? How can I adapt to these limitations? How can I save my business?
So when you're realized there are no "correct" or "incorrect" zodiacs you now can see how to combine them and why there are two of them in the first place. Again: sidereal is showing global thoughtprocess, a "source code", and the tropical showing the current physical events that you can see and touch, the "hardware processing the executable".
If you need to sell your car, and you can't do that, if you come to a western astologer he will tell you what is happening here in your life, at the Earth right now, and would suggest you to wait untill bad transit end/move to other town, etc.
But when you come to an indian(keep in mind 90% of "indian vedic astrologers" don't know anything about what I've written above, only few of them are pros)astrologer with the same question, his answer would be something like: why do you need to sell your car? What inability to sell you car trying to teach you? What was the chain of events that brought you, in this particular incarnation, here, to inability to sell you car? What changes in your inner self should first occur, untill you realize your inability to sell your car is a blessing, that forces you to change?
Keeping that in mind, if you just need to sell your car as fast as possible, without making a lot of thoughtprocess, you go to western astrologer.
If you want deep dive in your destiny, you go to indian.