CenturyLink vs Xfinity (Comcast)
Full speed comparison based on 1,740 verified measurements.
CenturyLink
248 Mbps
147 Mbps
47 ms
Xfinity (Comcast)
WINNER355 Mbps
79 Mbps
33 ms
Speed Difference Summary
Download difference
107 Mbps
Xfinity (Comcast) is faster
Upload difference
68 Mbps
CenturyLink is faster
Ping difference
14 ms
Xfinity (Comcast) has lower latency
By Country
Head-to-head comparison where both ISPs have user data.
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See if your connection matches the CenturyLink or Xfinity (Comcast) average.
How CenturyLink Compares to Xfinity (Comcast)
Based on 1,740 verified speed tests from CenturyLink and Xfinity (Comcast) customers, Xfinity (Comcast) delivers faster average speeds.
CenturyLink averages 248 Mbps download with 147 Mbps upload and 47 ms ping. Xfinity (Comcast) averages 355 Mbps download with 79 Mbps upload and 33 ms ping.
Averages tell only part of the story — actual speeds vary by your specific plan, location, time of day, and whether you use Ethernet or Wi-Fi. Run a speed test on your current connection to see how it compares to both averages before making a switching decision.