[78-L] Stylus size question for Gennett

[Glenn Longwell]

I currently have only one sized stylus for lateral 78s, 3.0 mils. I have a slightly smaller size, 2.7 mil, on another headshell set up for vertical discs.  
 
For the most part this 3 mil stylus works fine for my daily needs.  However, I recently acquired Gennett 6006, "Big Boy" George Owens.  While the disc is a bit worn I've had discs look a lot worse than this and play much better.  So I was wondering if it's a groove size/stylus size mismatch.  I changed my 2.7 mil stylus back to play lateral and it sounds markedly better, but now wondering how much better could it get? This is my first Gennett Electrobeam record.  Any advice on stylus size which works best for these?  It's time I started to expand my range of available stylii anyway.
 
Is the date listed on the record a recording date or release date?  I'm thinking it's a release date.
 
Thanks,
Glenn