I can see the difference most certainly progressive being better than interlaced and standards converted, and hear the difference too, lossless being better than lossy, NTSC being better than PAL speedup.
But I'll watch it however I can get it, DVD, BD, and VHS transferred to DVD-R. The important thing is the content, not the format, but I'll still take it as best as I can get it.
The deals of the week must make sense for MVM when they have stock to shift, and as a loss leader on Part 1s with the hope of shifting a few more full price part 2s. The questions would be if they have enough in the way of Blu-ray stock and titles to support a bargain of the week deal, and what the price sweet-spot would be. Would a £20 deal of the week be acceptable, or would a lower price be expected?