@AmiVeteran
The thing is that when you disply NTSC in your country, it probably doesnt look the same as when someone is viewing it here in 60Hz on an NTSC TV, the same goes for us when we use PAL, it basically looks horrible andd flickers like crazy, and the colors get distorted even on an RGB monitor.......so thats not really a good way of telling. Philip makes special TV's here in the USA that disply both NTSC an PAL...they even Auto adjust when displaying PAL and shrink the image to fit the screen and display all the lines. I suspect that the PHILIPS RGB monitors that they made for Amiga over there in UK probably do the same exept they expand for NTSC...............I suspect it because I have a MAGNOVOX (Same as PHILIPS in UK) that is the American Version of that PHILIPS CM888K or whatever that monitor is called...its a neat monitor and is better than the 1084s...............so try using NTSC on those monitors as that may be a good way of telling what NTSC looks like here in USA, unless the colors get distorted, then its not.
Th reason MegaDrive games were not Overscan is probably because they were ported from NTSC versions............Video Games companies Prioritize the USA and JAPAN for creating Video games, so other countries get leftovers I suspect.
As far as I see it, all PAL is the same as NTSC but with more lines to fill the black borders for PAL countries and runs at 50hz which will flicker more because when in interlace mode, since its a slower hz you will see the 2 fields of an interlaced screen flashing more because its slower............on NTSC I suspect they flash faster between the 2 fields and the flickering is less noticable.
Oh one question I wanted to ask you............you said something about running PAL in 60Hz? how do you do that? and can NTSC also be rn in 50hz as oppsoed to 60hz? Degrader seems to allow for this but it never works for me............the reason I ask is because I want to run PAL games in NTSC mode or actually run PAL in 60Hz so that maybe a game like Ruff N Tumble may work in USA TV's (currently it doesnt even with WHDLoad) There is a game called OUTFALL that ddoes this wonderfull trick of switching from PAL to NTSC without the speed of the music changing, or without the image shifting or shrinking........Absolutely amazing! I want to be able to do this with every game that is PAL, so that I can play them on huge American TV's