Some are the same quality, some are not. Between the three artists and their 35 paintings each, there have been 14 doubles (same pic by the same artist) This is the breakdown of those 14 doubles.
The way they are set as is as follows - av < av (meaning they were both average with the second one worth more than the first)
Artist 1 : av<av, av<bril, av>av, bril<av
artist 2 : av<av, av<av, av<av, av<av, mast>mast
artist 3 : av>av, av<av, av<av, bril<av, av<bril
So you can see out of 14, in only 3 cases was the original worth more than the copy, even in cases where the original was a better quality.
Norma