In terms of best overall quality, I don't think anyone makes better brass than Lapua. However, that doesn't always mean that Lapua is the best choice for a given application. It really depends on what your needs are, what your budget is, and what chambering is being discussed.
For instance, in 6.5-284 I have shot Lapua and Norma brass side-by-side. Lapua won, hands down. I wouldn't shoot anything else in this chambering. 6.5-284 is a low volume, max effort chambering where Lapua makes sense.
In 6.5x55, Lapua brass is dimensionally correct and reasonably priced. Here again, I wouldn't consider anything else. However, I am not set up to anneal and I am losing cases to split necks after just a few reloads. The people who say Lapua pays for itself in brass life vs less expensive brass are full of beans, IME.
In .223/5.56, I use LC exclusively, whether I am loading blasting ammo for my AR or match ammo for my bolt gun. It is inexpensive, has the most internal capacity, lasts for many loadings, and is capable of producing very accurate ammo with minimal prep. With its lower internal capacity and higher cost, I can only see Lapua being worthwhile in this chambering under very specialized circumstances.
In .308, my "go to" brass is Winchester. It is identical in internal capacity to LC brass and is a step up in quality vs LC, even though current production Winchester seems to be of lower quality than it was a few years ago. I am on my 8th reload with the current group of 100 cases that I have been using for load development and F-T/R matches, without annealing, and have yet to lose a case (except for one case that was bad right out of the bag).
I have recently begun work with Prvi .308 brass and it shows promise. It appears to be of higher quality than Winchester, has slightly greater internal capacity, and is less expensive. I also use 30-06 Prvi in my Garand. It is good quality, reasonably priced, and tough enough for semi-auto use. Other than military brass, I don't use anything else in my Garand.
These are just a few examples to illustrate my point. For a lot of standard chamberings, my first choice is Winchester, especially in higher volume applications. For my belted magnums, I reach for Norma or Nosler Custom and have been very happy with the results. In some applications, Lapua is the obvious choice.
Who makes the best brass? In practical terms, the answer depends on the chambering and what you are doing with it.
