@bigman91@Arc - Basic plan is "included in Jio package" which refers to 1499 plan which includes NF 350 plan (correct me if I'm wrong). Your paying 1499 + 150 + tax for Standard NF plan. Same goes for UHD plan.
I don't understand where you're getting INR 350 figure from.
This mentions that the Basic Plan is at INR 500 and not INR 350.
The only price difference you can say is on account of GST. i.e. You'll be paying INR 90 more on account of an increased GST. To sum it up, I'll present two options.
Option 1: Buy separate Netflix plan and Jio INR 999 plan
Amount paid to Jio: 999+ GST@18%: INR 1180
Amount paid to Netflix: INR 499
Total Amount under Option 1: INR 1679
Option 2: Buy Jio INR 1499 plan
Amount paid to Jio: 1499+ GST@18%: INR 1768
Thus under Option 2 you are effective paying INR90 extra, but at the same time, you're also getting almost double the internet speed. Obviously, it's going to be a different question if there's any tangible benefit in getting that extra speed, since I don't think the difference will be noticeable for anyone apart from a power user.