Need? Nope. However if you like to manipulate your charging handle by just pulling the left side of the handle vs the traditional method of using both sides, gunfighter charging handles with their extended latch are far easier to use. They are also built a little beefier to handle stresses traditional charging handles weren't designed for. I will admit I think they are a bit over-priced which is why I tend to wait till they are on sale before I buy. Their $1 sale with purchase of an upper during Christmas was awesome but too bad for the OP that ship has sailed.
If you're suggesting that I only recommended the gunfighter charging handle because of the laser engraving/marketing, you couldn't be any further from the truth. What BCM engraves on the handle is not relevant to me. They can call it whatever they want so long as it works as advertised. Marketing is simply a fact of life when it comes to product promotion. At least BCM sells solid products, I don't think anyone would call their gear substandard, to go with that marketing vs some companies that peddle shit products while putting all their effort into cool marketing.