The biggest differences between ,say a Lotus (one of the high ends being considered in the group buy, and refects back to the OP's question), and a Deco is that the Lotus has many small indentions, recesses, etc. At each of those places the plating is clean and consistent. The plating also seems to be much more substantial.
The plating on the Broadwells that I have bought has been erratic from one to the next, and not smooth. Additionally, some of the crystals were glued in crooked.
Now, that is to be expected as the Lotus is a $60 set and the Broadwell a $40 set. So, the comparison IS apples to oranges. BUT again, IMHO, the Broadwell's are NOT top quality. BUT, the Majestic and JR Majestics are similar in quality (and price) to the Dayacom high end.
What I should have posted is that the Majestics would be a better purchase for me as they are higher quality AND proven winners in my sales arena. The Broadwell's ....not si much.