Different StorageQuota

I issue these two commands in Powershell for a Sharepoint E1 site:

$basic = Get-SPOSite | Where { $_.URL  -eq "https://mysite.sharepoint.com/" }
$detailed = Get-SPOSite -Detailed | Where { $_.URL  -eq "https://mysite.sharepoint.com/" } 

Now:
$basic | fl
gives (among other values) 
StorageQuota              : 85060

but
$detailed | fl
gives (among other values)
StorageQuota              : 1048576

Why the difference and which is correct?

Best regards George