BioSculpture for me...no contest. I have looked at both extensively, and at one point considered switching to Calgel (I even trialled it), but they just couldn't come up with the goods for me.
On the upside Calgel does have a great customer service and no minimum order, but having now used both gels, I really prefer Bio Sculpture.
Calgel yellowed quite badly on me....not just on the nails, but a pot of clear had gone yellow by the time I got to the bottom (admittedly not very fast, but I still don't expect that) Bio used to yellow, but since the introduction of S-gel that never happens now.
The Bio colour range is quite a bit larger and seems to have more selection, and the Free Edge sculpting gel is out of this world. It allows for the most gorgeous natural sculpt....I don't believe Calgel has the equivalent. I can knock a set of Bio Sculpts out now in less than an hour...
And the most important thing....Bio Sculpture is known and asked for by clients.....I have had people ring me up and specifically request Bio Sculpture.....several times. I've never had a call for Calgel. Bio Sculpture have also taken to advertising in woman magazines and clients have noticed it.
And ok the minimum order is annoying, but I've always ordered more anyway apart from the one time I needed an item in a panic, so I collected in person and they put aside the minimum order for that.