Using jQuery in Capybara tests

I'd like to ask your opinion about using jQuery in Capybara specs. Is it really simulating the real user interaction, or is it faking it?

• Is using find("#my_checkbox[value='1']").set(true)
  
  the same as page.execute_script("$('#my_checkbox').prop('checked', true);") ?
  
  
• Or find("#my_button").click
  
  the same as page.execute_script("$('#my_button').click();") ?

I know that the spec result will be the same, but I'm really wondering:

• the real user won't use the JS browser's console to click on a button, so should we just replicate that without using jQuery in the specs?
• what about the spec's performance and speed? Is there any advantage on using jQuery?