MAX17201/5 will be a better option since it implements the Maxim ModelGauge m5 algorithm, and will generate a model for common LiPo chemistries. For a single cell, the MAX17201 would be the preferred part. If you are planning to use up to 3S, please use MAX17205. The algorithm in the MAX17201/MAX17205 is newer and more accurate compared to the fuel pack algorithm used in DS2788. The current consumption of MAX17201/5 is also smaller that DS2788. One of the advantage for DS2788 is the LED driver. However, if you do not need LED driver in your design, I would suggest you to use MAX17201/5. T