There no way of knowing what's right or wrong. Both have plus and minus and yes you have sperm on tap which is mature and most likely more motile. When they extract from epidydimis we can only have Isci as sperm not of maturity to do normal ivf.
It's so hard making any choices! Sometimes I look at my teenage stepchildren and think things like, teens are hard work or wow it's great we can do what we want when they come stay as they're not little anymore and am I doing the right thing?!? Haha!