Great news - sounds like it's chalk and cheese ?
The amount of advance sounds about right. I should have mentioned in the numbers I gave above, those are the originals from the days of leaded petrol. Mini Spares apparently have them tweaked a little to better suit unleaded fuels, so there'll possibly be a degree or 2 difference here and there in the curve from those numbers. The distributors I've tested in their range have been for 1275 engines and they track bang on to the original curves, others might have some variation as mentioned.
Proof of the pudding as the say, is in the eating. If the engine does everything it should - starts on the button, drives without pinking, temps stay in the right range, cruises smooth, accelerates as you would expect - then you can be reasonably sure, at worst, that it's close to the mark and likely to get any better would involve a rolling road session and the dissy tweaked from that.
In regards to your dwell angle I've never looked in to that nor measured that for these with the Electronic modules - not much you can do about it anyway, however, as they switch 'clean' they will need less. When I say switch 'clean', if you were to look at how points switched on an oscilloscope, you'd notice as they open and close, the current doesn't snap from off to on and on to off, but there's some 'fuzz' or 'noise' at these occurrences, where as the electronic module does snap open and closed clean. By doing so, it needs less dwell and even with the same coil, you'd find that when running from the electronic module, it'll have a higher output voltage as a result of this clean switching.
As you say !
Regarding the advance : after so much reading I should have learnt that modern fuels allow more advance
Learning from our own experiences is priceless !
Thank you again, Moke !