Both of these devices are good units for vaporizing your concentrates. The pros and cons are.
We feel the carta is a better buy. The batteries are removable and replaceable. The heater is more affordable, and they both work about the same. The puffco peak is all hype. If you want a dab rig that works as well or better than both of these consider the Dabble.
For really discrete on the go we really love our wax maxer
And for the ultimate connoisseur, nothing compares to the Silver Surfer with the EOK dab dish
You can see some more info on portable vapes in the video below