I have a full set of extensions on right now and this is what my left hand looks like:
The two nails with sculpture extensions were done on Wednesday and the three with tip overlay extensions were done on Friday. As you can see, with the french tip overlays, you get a nicer, standardised “smile line”. However, if your nails are yellow, it shows up as the overlay is done with clear acrylic compared to pink + white acrylic for the sculptures.
Sculptures are also more natural-looking IMO when you look at the nails from below – not plasticky-looking like the tip overlays! However, they are a lot more tedious as you have to build the tip from scratch and fit the finger well with a nail form. It takes a lot more time than just sticking on the nail tips and covering the whole nail with acrylic. Personally, I prefer the sculpture extension, but I need to work on getting the “smile line” to look more like a V instead of a C.