My feelings about the two lasers couldn't be farther apart.
I think the J-frame lasergrips are handier than a pocket on a shirt. I wouldn't carry a J-frame without them anymore, given the choice, and that set right there is on its second gun, having first been installed on a 442 a dozen years ago. They're fantastic dry-fire aids on the snubby revolver, and for a gun that may be fired from an awkward position in a hurry and under less than ideal lighting conditions, they're a boon.
Meanwhile, the laser on the BG380 is next to useless for me.
The difference? The CTC Lasergrips on the J-frame are grip-activated. There's nothing you need to remember to push or nudge or whatever; grab the gun and the laser switches on.
Meanwhile, on the BG380, the activation switch is a lightly countersunk rubber nubbin in front of the trigger guard that takes a deliberate press with your trigger finger to turn on. It might as well be in Albania for all the odds that I'll remember to hit it in a hurry.
Building the frames with a built-in laser using a button on the front- or backstrap would probably add too much cost to the little guns. There's a no-laser variant available now, and if it had been around when I bought mine, it's what I'd have gone for.