Starline brass primer pockets definitely hold up well. I use theirs for 6.5cm and had used their 3006 brass before, but I took the barrel off and sold that brass before I got to the end of life for it. It may not hold up as well if you super hot rod it, but it does hold up well with max book loads. I use the SRP 6.5cm so that's not a fair comparison, but I think I got through 4 reloads on the '06 brass before selling it and the pockets still felt tight as new with shooting a 180gr at 2850fps. The uniformity is also incredible considering the price and from what I've measured it seems very close to Lapua. In my 6.5cm, it certainly wouldn't make a difference in accuracy going to Lapua.
The web area may not be as thick in starline as Lapua, but I haven't seen a cross section to compare. I'd expect plenty of life from starline as long as your die isn't oversizing brass. I'm a fan of Lee dies . They make really straight rounds for me. Unfortunately, they fit the mold of off the shelf dies that oversize the case.
I have some 208eldm that I was planning on shooting in my 30-284ai , but I think I'm abandoning that and will go back to my '06. If I do, we'll see how the 208 does with staball 6.5.