To the untrained eye, it is hard to tell the difference between the two lace types.
Both types are undetectable.
The Swiss Lace is slightly thinner, and a little less detectable, however it is also less durable and it tears easier.
The Swiss Lace is not recommended for first time users. It is best to learn how to apply the wig and become skilled at the application prior to advancing to the Swiss Lace.
The French Lace is more durable and will hold up better over the long run.
Most new lace wig wearers order the French Lace.