Does anyone know it the hole spacing or hole sizes are the same for both Hohner and Oskar? Is it standard in design of the instrument. Just wondering for future single note playing if it’s easier to buy one brand over the other. Thanks
Somewhere (don’t remember which thread) on the forum I saw a picture of the two. If I recall correctly, the LO had bigger holes and narrower posts between than the Honer. But maybe some forum member with both can post a pick for you. From various threads I’ve read, I am certain a few members have both in their collection. 
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I think the holes on the Lee Oskar are slightly bigger. I don’t believe there’s a standard.
Check this thread, you’ll find a lot of info.: Special 20 or Lee Oscar harmonica for a beginner
Check the @Luke reviews too before you buy.
Ciao
Stefano 
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Thee L O holes are larger and notes very play. I have one and five Hohners. The note quality of the L E is much less than a Hohner. my L E has not been played for months. The Oskar is very large and shape is not to my liking. Too thick and I find it tough to get comfortable with it. bottom line is a Rocket or Crossover is very hard to beat. I tossed the wooden combs and replaced with a plastic comb. My Hohner harps have plastic combs as Hohner uses a soft wooden comb. Moisture and porous wood are a bad combination.