If this was quoted from a sales clerk, it is intended as a compliment to get on your good side through empathy, and it is not stated as such very well. The conjunction, “but”, basically wipes out the first part of the sentence in the context they used it in. And the ending clause “it will work better”, does imply your skin needs therapy with the other product.
If it were from a friend, it is probably well intentioned as a compliment. They were hoping to tell you about something they have had success with and know you probably have your own skin care product. They have used this other product and think it’s the bomb, and hope to get you to try it also, no insult intended.
If it was from a smart alack, it was an insult and they should be thrashed with a limber, willow switch. :)