what is the best net returning (after expenses) short term t-bills etf

Since January 1, 2025, Cloudflare (NET) has returned 75.5% and AT&T (T) has returned 30.8%.

DATE Cloudflare AT&T
August 15 2025
$200.91
$28.87
August 14 2025
$195.38
$28.75
August 13 2025
$199.34
$28.40
August 12 2025
$202.33
$28.48
August 11 2025
$201.17
$28.14
August 08 2025
$204.60
$28.08
August 07 2025
$210.44
$28.06
August 06 2025
$215.53
$27.49
August 05 2025
$207.81
$27.77
August 04 2025
$208.80
$27.68
August 01 2025
$200.11
$27.75
July 31 2025
$207.68
$27.41
July 30 2025
$200.85
$27.50
July 29 2025
$199.43
$27.41
July 28 2025
$199.41
$27.60
July 25 2025
$198.42
$28.00
July 24 2025
$191.58
$27.92
July 23 2025
$189.15
$27.75
July 22 2025
$190.55
$27.42
July 21 2025
$197.76
$27.38
July 18 2025
$197.35
$26.94
July 17 2025
$191.25
$26.99
July 16 2025
$189.81
$26.95
July 15 2025
$186.97
$27.02
July 14 2025
$182.90
$27.16