Here is a quote from http://www.reviversoft.com/file-extensions/otf
"The .otf file extension is used as an OpenType Font file wherein this font type was developed by Adobe and Microsoft. It is a combination of font formats such as TrueType and Postscripts. Aside from being a font type file, the .otf file extension is also used as a template file that’s used by OpenOffice spreadsheets for formula creation."
Another source said that TTF is an older font type and that .otf is newer and arguably better. One of the differences is that OTF uses glyphs along with CCF (Compact Font Format) tables. It states that CCF uses cubic Bezier splines vs. TTF using quadratic Bezier splines. Would that make a difference when we convert a letter to a vector? Would the newer font format give vectors that better describe the letter form?
Also since Michael was able to import and use a .otf has Vectric already built in support for .otf fonts? Maybe we are looking at a feature upgrade that could be incorporated into future versions of the software.