I worked in the residential product business and the commercial PC business but we did not treat for termites. Having said that, treatments are similar in many ways.
As a rule of thumb, treatment for insects can be done with contact poisons (liquids, powders) or bait form (designed for consumoption). Sentricon is a bait. The advantage of contact poisons is they are spread all over and make it easier for insects to contact the poison. The disadvantage is the poison is spread all over and its life is more limited.
Baits, like any food, need to be located and consumed. Contact with the poison (finding it) is more difficult which may lengthen the time before the poison works. Once located and consumed, they are equally and perhaps more effective.
When it comes to most pest control products, I prefer the longer lasting baits for their safety (why spray poison everywhere)and longer term effectiveness. The key to good pest management is the operator knows the insect behavior. With that information, the operator places the poisons in an area where it is most likely to be discovered and consumed.
This is not so much a better or worse product choice. But being confident the training of the operator is well done. I would spend more time talking to a company about their personnel training, their internal technical support and the experience of their employee who is making the application.