Is star length and lower half length important?

[Peanut1234]

Is there any difference between a diamond with a star length of 50 and lower-half length of 80 and a diamond with a star length of 55 and lower-half length of 75? Are star length and lower-half length important things to consider in deciding on a diamond? Thanks!

 

[strmrdr]

stars within reason arent that important, lower halfs are vital
http://journal.pricescope.com/Articles/68/1/Do-the-pavilion-mains-drive-light-return-in-the-modern-round-brilliant.aspx