I prefer to offer both services. I love to do both services.
The fact is you need to know how to do both services.
a.) One service is not better than the other although one is cheaper for the technician than the other.
b.) These days especially using well-less tips one service is not quicker than the other either. An experienced technician takes no time at all to size tips correctly ... a minute or 2 at most, where as I see sculpted nails taking many much more time to file at the end of the service to get the perfect shape that a tip gives one automatically.
c.) One service is not really stronger than the other as if the tip is applied correctly, it is so thin that it really only acts as a template for the product. I have never seen more breakages with one service over the other.
d.) One service is not more beautiful than the other as if done well, you should not be able to tell by looking, whether a nail is sculpted on a tip or a form.
The majority of clients do not know what they prefer and take my recommendation. I make a recommendation on which service is the easiest for me to perform on their particular nails. If someone asks specifically for one service or the other .. I do it for them ... this is rare.