Goldfish.... yes, I own these two...
The two are VERY different. Nyman's 'Get Nyman' set outclasses Jermay's 'Skulduggery' in every way possible—therefore, it is impossible to compare the two DVDs. I think the values of each are very different, as would your reasons for purchase.
Nyman's DVDs contains rock-solid effects, insights and a bit of 'cheeky' Nyman character unwrapping. Jermay's is perhaps a little less workable—and is more a study of mentalism/psychology etc. for people who are already fans of his works.
The content, quality, and overall feel are very different. Nyman's DVD reeks maturity, class and style. Whereas Luke's is basically the first rung on a ladder. Albeit a very good ladder and rung
As I have said before in these tomes, the Nyman DVD is a wholesome and thoroughly enjoyable standalone project. In my opinion, Jermay's is more an accompanyment to his books—and in that context, the books and the DVD make an excellent set.
It should not be said that I would not recommend either Nyman's or Jermay's—they are just simply two completely different products.
For me, the 3 DVD Nyman set has the edge, as it is punchy and more inclusive. Jermay's is a little thin on the ground all round.