Why Would "YTD" Visits and "This Year" Visits be different?

[BriannaDougherty]

Can someone help me understand why the volume of visits would be different when looking at YTD vs This Year? It is a small difference but I am wondering the cause. 

[gmadala]

High possibility why you might see the difference, 
Reasons- 

• This year would include Entire year including current min data as well ( most latest data ) 
• YTD - you might have to check on how exact the base datetimes are selected, could be selected as Start of year until start of today or end of today or a different combination. 
   

If you could paste the screenshot and I can see what exactly would be the issue. 
Thanks

[Jennifer_Dungan]

YTD isn't a "standard" date range, it sounds like a custom date range set up by someone in your Org? You should take a look at what the definition of that range actually entails...